Supply, installation and commissioning of hf radio communication system for air traffic services

Bidders Declaration and Structure Clarification Form: Bidders must specify bidding structure (individual, joint venture, consortium) and indicate primary bidding entity. Form requires details for individual bidder, lead JV member, or primary entity in consortium, plus details of any JV/consortium members. This form clarifies the legal structure of the bidder for evaluation purposes.

Closing date and time: 16 November 2026 at 14:00 CAT

Clarification queries deadline: 26 October 2026 at 17:00 CAT

Consolidated responses to queries: 02 November 2026 at 17:00 CAT

Bid validity period: 120 days from submission

Pre-bid enquiries: Specialist: Demand Management, Siyabonga Ncube, email: [email protected] (cc: [email protected])

Post-bid enquiries: Specialist: Acquisition Management, Lesedi Mashiloane, email: [email protected] (cc: [email protected])

Submission address (hard copy): ATNS Company Limited, Eastgate Office Park, Block C, South Boulevard Road, Bruma, 2298, South Africa

Submission structure: three parcels

Parcel A – Administrative and Mandatory (Phase 1 and 2 Evaluation): Volume 1B (Conditions and form of contract/SLA), Volume 1A (General instructions and administrative requirements, excluding SBD 3.3 and 6.1)

Parcel B – Technical Proposal: Volume 2 (Technical specifications), Volume 3 (Project management specifications), Volume 4 (Logistics support specifications)

Parcel C – Price and Preference Points for Specific Goals (Phase 5 Evaluation): SBD 3.3 (Pricing Schedule – Professional Services), SBD 6.1 (Preference Points Claim Form), CSD Report, CIPC Documents, Shareholder Certificates, ID copies of shareholders, Valid B-BBEE Certificate or Sworn Affidavit (for EMEs/QSEs)

Closing date and time: 16 November 2026 at 14:00 CAT

Submission methods: online via e-Submission (e-Tender) system OR hard copy (one original, one copy, one PDF on USB)

Hard copy delivery address: ATNS Company Limited, Eastgate Office Park, Block C, South Boulevard Road, Bruma, 2298, South Africa

Bid validity: 120 days from submission

Clarification queries: use Form of Questionnaire (Appendix A) by 26 October 2026 at 17:00 CAT

Consolidated responses to queries: by 02 November 2026 at 17:00 CAT

Stage 1 – Administrative Requirements: non-compliance may result in rejection or 7 days to submit supplementary information (administrative only)

Stage 2 – Mandatory Requirements: must comply to proceed; failure leads to rejection

Stage 3 – Technical Evaluation: 100 points total; minimum sub-threshold 75% (75 points) for each of Volumes 2, 3, 4; overall minimum threshold 75 points (75%)

Stage 4 – Price and Preference Points for Specific Goals: 90/10 preference point system (per SBD 6.1); price points calculated per formula; specific goals points claimed via SBD 6.1 with supporting documents (CSD Report, CIPC documents, Shareholder certificates, ID copies, B-BBEE certificate or sworn affidavit)

ATNS evaluates per Preferential Procurement Regulations, 2022

Scope: Supply, delivery, installation, commissioning of HF equipment at Bapsfontein and Delmas with associated maintenance and support

Sites: Bapsfontein (Receiver site), Emergency (Disaster Recovery site), Delmas (Newly planned transmitter site), FAOR technical centre, Isando (Current transmitter site)

Purpose: Replace obsolete HF equipment at Isando and Bapsfontein; new HF Transmitter station at Delmas; maintain SLA for communication with aircraft in INO and SAT oceanic regions

Technical details in Volume 2 (Technical specifications), Volume 3 (Project management specifications), Volume 4 (Logistics support specifications)

Pricing: SBD 3.3 (Pricing Schedule – Professional Services) in separate envelope (Volume 1C); price must include all customs/duties, delivery, installation costs

Rate of exchange: ATNS not liable for exchange variation in Acquisition Phase; contract price fixed in Rands for Acquisition Phase; contractor bears exchange variation cost

Options/Contract Variation Orders: hedged upon receipt of Order; variation between quoted and hedged rate for contractor's account

Contract variations: only by Engineer approval; 30-day approval period

Maintenance phase: Contractor hedges foreign content annually; variation between spot rate and hedged rate for ATNS account/credit

Contractor must provide: total estimated foreign component cost of support maintenance, escalation percentages per year, total cost in foreign currency (Table A) and local currency (Table B)

Exchange cover: within 14 days of contract receipt, arrange exchange cover for total exchange amount

Performance security: within 30 days of contract award, furnish performance security per SCC (bank guarantee, irrevocable letter of credit, or cashier's/cheque)

Warranty: 12 months after goods delivery

Payment terms per GCC clause 16

CSD registration mandatory (proof required with bid)

Valid tax compliance status (SARS PIN/TCS) – each JV/consortium party must submit separate proof

B-BBEE certificate or sworn affidavit (EMEs ≤R10m, QSEs ≤R50m)

CIPC registration documents

Shareholder certificates and ID copies of shareholders

Completed and signed standard forms:

• SBD 1: Invitation to Bid (offer cover page, bidder details)
• SBD 3.3: Pricing Schedule – Professional Services (pricing in separate envelope)
• SBD 4: Declaration of Interest (discloses state employment/relationships)
• SBD 6.1: Preference Points Claim Form (claims specific goals points)

No directors/shareholders employed by state or connected to ATNS employees

No collusive bidding (SBD 9 implied)

Acceptance of General Conditions of Contract

Professional body registration where applicable

Declaration of Interest mandatory

Invitation to Bid mandatory

ATNS requires a service provider for the supply, delivery, installation and commissioning of HF (high frequency) equipment at two sites — Bapsfontein and Delmas — together with ongoing maintenance and support. This volume covers project management and systems engineering requirements only; technical specifications, pricing and commercial terms are in other volumes.

No contacts or addresses stated in this volume — refer to other tender volumes for SCM and technical contacts, submission address and service delivery addresses.

Submit in English as per the General Information and Instructions to Bidders document.

Returnable forms and documents:

• Draft Project Management Plan (PMP)
• Draft Master Project Schedule
• Draft Work Breakdown Structure (WBS)
• Draft Statement of Work (SOW)
• Draft Resource Allocation Plan
• Proposed Contract Data Requirements List (CDRL) with delivery schedule
• Resumes of key personnel
• Draft Systems Engineering Master Plan (SEMP)
• Draft Test and Evaluation Master Plan (TEMP) with Acceptance Matrix
• Draft Installation, Transition and Commissioning (ITC) Plan
• Draft Project Quality Assurance Plan
• Draft Safety File (SHE File)
• Draft Environmental Management Programme (EMPr)
• Draft site survey report
• Risk Management Plan outline
• Relevant project experience list with completion dates, client names, contact details and scope descriptions

Compliance declaration format:

• Bidders must declare C (fully compliant = 2 points), PC (partly compliant = 1 point), NC (not compliant = 0 points), or Noted for each paragraph
• Proof must accompany every compliance declaration; a declaration without proof will not be accepted
• Mandatory (M) paragraphs: non-compliance disqualifies the bid from further evaluation
• Desirable (D) paragraphs: bidders must declare compliance level, provide formal response and reference supporting documents
• Information (I) paragraphs: respond and provide information if requested; may form part of contractual terms
• Optional (O) paragraphs: bidder decides how to respond

Disqualification risks:

• Non-compliance with any mandatory (M) requirement
• Inadequate, unclear or missing responses interpreted as "Not Compliant"
• Responses that do not address the specific paragraph requirement
• Unsigned or omitted returnable forms

Two-stage evaluation with compliance scoring per paragraph:

• C (fully compliant): 2 points
• PC (partly compliant): 1 point
• NC (not compliant): 0 points
• Noted: accepted for information paragraphs only

Mandatory requirements (M): proposals not complying are disqualified from further evaluation.

For PC or NC declarations, bidders must include a statement on the nature of the variation and may supply additional supporting information to demonstrate how the proposal may still meet ATNS's needs.

Preference point system: not stated in this volume — refer to tender conditions in other volumes.

Minimum qualifying score: not stated in this volume — refer to tender conditions in other volumes.

Scope: supply, delivery, installation and commissioning of HF equipment at Bapsfontein and Delmas, with associated maintenance and support.

Project management deliverables:

• Comprehensive project plan covering management, performance, monitoring and coordination from kick-off to contract completion
• Monthly project status reports (or mutually agreed intervals) with schedule critical path, cost analysis and risk report
• Fortnightly project status reports capturing performance and recommendations
• Progress review meetings at monthly intervals at airport premises, ATNS offices or mutually agreed locations; written reports and presentation material due one week before each meeting
• Draft agenda due two weeks before each meeting; minutes with action item list within one week after
• As-built drawings on commissioning
• System acceptance on commissioning completion

Systems engineering:

• Draft Systems Engineering Master Plan covering full lifecycle: requirements analysis, design, installation, setting to work, testing, operational evaluation, commissioning, maintenance and logistic support
• System Design Review after site survey
• Total system performance responsibility
• Subsystem and interface compliance with allocated requirements
• Customer-furnished information/equipment to be identified

Testing and evaluation:

• Factory Acceptance Test
• Hardware Inspection Test
• Site Acceptance Test

Installation and commissioning:

• Uninterrupted service during transition from existing to new system
• Cutover, commissioning and decommissioning procedures

Site survey requirements (before any equipment ordered):

• Receiver site, transmitter site, disaster recovery site, control and technical centre
• Generator electrical connections and remote monitoring interfaces
• Cable routing and actual route length measurements
• Existing cable tray space
• Photographs of all identified aspects

Key personnel:

• Resumes required for key personnel
• ATNS reserves right to direct removal of personnel deemed inappropriately qualified or experienced

ACSA permits for FAOR complex:

• Personal Permits valid for works period required for all staff
• Aviation security awareness training
• Valid certified copy of ID or passport
• Police clearance by ACSA
• Cell phone carry request with supporting documentation
• Company registration with ACSA required; all permit costs for successful bidder's account
• ACSA Permit Office contact: 010-207-2899

No pricing format, bid security, bonds, guarantees, retention, payment terms or financial capacity thresholds stated in this volume — refer to tender conditions and pricing schedules in other volumes.

Cost responsibility:

• Each party bears own costs for attending progress review meetings
• Successful bidder bears all ACSA permit costs

Quality assurance:

• Company QA policy and procedures
• Relevant accreditations
• Monthly audit reports with corrective actions
• ATNS right to inspect, test or audit at contractor or subcontractor premises

Occupational health and safety:

• Draft Safety File per Occupational Health and Safety Act 85 of 1993 and SABS 0142-1981, for ATNS approval before construction commences
• Final Safety File to include after contract award: valid Letter of Good Standing (COID), public liability insurance certificates, OHS 37(2) mandatory form agreement, legal appointment letters for all construction roles, ATNS OHS specifications, risk assessment, baseline risk assessment with risk matrix, medical fitness certificates, airside safety plan, emergency plan
• Draft Safety File must include: signed health and safety policy, scope of works with organogram and OHS responsibilities, method statements, signed subcontractor agreements, competency certificates for all legal appointees, draft health and safety plan, check sheets and registers (PPE, mobile plant, public safety, site establishment, trenching, backfilling, fire fighting, first aid, hand tools, hygiene, daily plant, environmental), incident investigation and reporting procedures, toolbox talks list, waste management plan

Environmental:

• Draft Environmental Management Programme per National Environmental Management Act 107 of 1998 and ATNS environmental specifications
• Energy efficiency, environmentally sustainable materials, biodiversity management (soil erosion, vegetation clearance, rehabilitation, flora and fauna protection), waste and water management, air quality/dust suppression, visual and aural impacts
• Suitably qualified environmental officer or service provider required

No B-BBEE level, CIDB grade, CSD registration, tax clearance, CIPC registration, professional-body registration or local content percentage stated in this volume — refer to other tender volumes.

Procuring entity: Air Traffic and Navigation Services Company SOC Ltd (ATNS). Tender for supply, delivery, installation, commissioning, and 15-year maintenance and support of HF equipment at Bapsfontein and Delmas. Reference: ATNS/RFP05/09/2026/2027/HF_REPLACEMENT_RE_AD.

Closing date: 16 November 2026 at 14:00

Compliance-based evaluation: each requirement scored C (fully compliant, 2 points), PC (partly compliant, 1 point), NC (not compliant, 0 points). Mandatory requirements (marked M) must be met or bid disqualified. Bidders must respond to each paragraph with compliance declaration and supporting references. No overall price/functionality split or preference point system detailed in this volume.

Scope: Supply, delivery, installation, commissioning, and 15-year maintenance and support of HF equipment at Bapsfontein and Delmas.

Phases: Development (Phase 1A bid submission, Phase 1B contract baseline), Implementation (Phase 2 roll-out/installation), Validation (Phase 3 PBU – 1 year after Site Acceptance Test), Application (Phase 4 – 15-year operational life).

Performance requirements: System availability 99.98% (max 1.752 hours downtime/year), reliability 98.5% (max 4 failures/year over 15 years).

Support concept: Three-tier (Operator, Intermediate, Depot) aligned with ATNS maintenance model.

Key deliverables: Integrated Logistic Support Plan (ILSP), Logistic Support Plan (LSP), Reliability Availability Maintainability Plan (RAMP), Training Plan (operational training for 10 personnel, advanced technical maintenance for 8, hardware training, e-learning, on-the-job training), Spares Plan (15-year coverage, consumables for first 2 years), Test Equipment Plan, Documentation Plan, Package Handling Storage & Transport Plan, Configuration Management Plan, Interface Control Documents.

Maintenance & Support Contract: 15 years, quarterly invoicing in arrears, labour/service rates for local/overseas resources, LRU repair turnaround 45 business days, penalties for TAT breach, obsolescence management, emergency resource provision within 48 hours.

Severity levels and service level response times defined in Tables 3 and 4.

Pricing for Maintenance and Support contract to be submitted in Volume 1C only. Quarterly invoicing in arrears. Schedule of labour and service rates for local and overseas resources, normal hours, weekends, public holidays. Penalties for LRU repair turnaround time exceeding 45 business days: penalty formula based on priority factor, actual vs maximum response time, up to 10% of annual contract value per quarter, capped at annual value. No bid security, performance bond, or retention details in this volume.

Mandatory compliance with all requirements marked (M) in this document; non-compliance leads to disqualification. Bidders must submit a compliance statement for each specification. No specific CSD, tax, B-BBEE, CIDB, or local content requirements detailed in this volume.

Procuring entity: Air Traffic and Navigation Services Company SOC Ltd (ATNS), a state-owned company (registration 1993/004150/30).

Tender reference: ATNS/RFP05/09/2026/2027/HF_REPLACEMENT_RE_AD

Document: Volume 1B — Conditions and Form of Contract (Service Level Agreement), October 2026.

Confidentiality: all information is confidential to ATNS and may only be used for preparing a response; no disclosure to third parties without written consent.

Contract precedence: this Contract and its annexures supersede conflicting requirements in associated documents.

Governing law: South African law, unless ATNS decides otherwise.

Order of precedence: special conditions prevail over general conditions where conflict exists.

Severability: illegal or unenforceable provisions are severed without invalidating the remainder.

Contra proferentem rule: does not apply — each provision negotiated for benefit of both parties.

No contacts stated in this volume — refer to Volume 1A for SCM and technical enquiry details.

Submission method and address: not stated in this volume — refer to Volume 1A or the RFP invitation for closing time, address and channel.

Returnable forms required (standard ATNS tender pack, confirm in Volume 1A):

• SBD 1 (Invitation to Bid): cover page with bidder details and signed offer.
• SBD 3.1/3.2/3.3 (Pricing Schedule): completed pricing for goods/services/professional services as applicable.
• SBD 4 (Declaration of Interest): discloses state employment or connections to ATNS personnel.
• SBD 6.1 (Preference Points Claim): B-BBEE points claim under PPPFA.
• SBD 6.2 (Local Production and Content): local content declaration.
• SBD 7.1/7.2 (Contract Form): purchase of goods or rendering of services contract signature.
• SBD 8 (Past SCM Practices): declaration of previous tender irregularities.
• SBD 9 (Independent Bid Determination): anti-collusion certificate.
• Authority to Sign / Board Resolution: authorises the signatory to bind the bidder.

Disqualification risks: any unsigned or omitted returnable form; late submission; failure to submit required security or guarantees where called for.

Evaluation framework: not fully detailed in this volume — refer to Volume 1A for complete scoring methodology.

B-BBEE requirements found in this volume:

• Prime contractor must maintain a B-BBEE status level.
• Subcontracting exceeding 25% of the Project to any enterprise with a lower B-BBEE status level contributor is prohibited, unless that portion is subcontracted to an EME that has the capability and ability to execute the work.

Preference points system: not stated in this volume — confirm 80/20 or 90/10 in Volume 1A.

Minimum qualifying score: not stated in this volume.

Scope: supply, delivery, installation and commissioning of HF (High Frequency) equipment at Bapsfontein and Delmas, with associated maintenance and support.

Additional deliverables:

• Complete HF system for training purposes at the FAOR operational complex, including auxiliary equipment (consoles, headsets, computer peripherals, etc.).
• Training of technical and operational personnel on the acquired HF system.
• Support and maintenance of the complete HF system and auxiliary equipment for 15 years.
• Mid-Life Upgrade of the HF system during the equipment life.

Contract structure:

• Acquisition Phase: 3 years (2 years for acquisition + 1 year Period of Beneficial Use).
• Maintenance and Support Phase: 15 years.
• Total Period of Contract: 18 years.
• Life of Supplies and Services: 15 years from date of Acceptance.

Key acceptance stages:

• Factory Acceptance Test (FAT): at contractor's facility; 14 days notice required; FATP submitted 30 days before FAT.
• Site Acceptance Test (SAT): at installation sites; SATP submitted 30 days before SAT.
• Physical Inspection: for training, documentation, spare parts, maintenance equipment.
• Substantial Completion: follows successful SAT; triggers commencement of PBU and Guarantee Period.
• Final Acceptance: end of PBU with validated Integrated Logistic Support Plan (ILSP).

Guarantee Period: minimum 12 months per part, commencing on Acceptance.

Period of Beneficial Use (PBU): minimum 12 months from Site Acceptance to Final Acceptance.

Engineer: ATNS-appointed representative for contract administration and acceptance decisions.

Management plans required (Schedule C):

• Project Management Schedule
• Installation, Transitioning and Commissioning Plan (ITC Plan)
• Systems Engineering Management Plan (SEMP)
• Test and Evaluation Master Plan
• Integrated Logistic Support Plan (ILSP)
• Reliability, Availability and Maintainability Plan (RAMP)

Language: English for all business and documentation.

Pricing components to be scheduled (Schedule A / A1):

• Price for Equipment
• Price for Services
• Price for Documentation
• Price for Training of Operating and Maintenance Staff
• Price for Test Equipment
• Price for Acceptance Test
• Price for Spares
• Customs duties and surcharges (if applicable)
• Total Contract Price

Payment:

• Milestone Payments based on measurable achievements (delivery, installation, acceptance).
• Payment effected 30 days after presentation of correctly produced invoice to the Engineer.
• Milestone Payment Schedule: Schedule A1.

Price basis:

• Fixed price or not-fixed price (subject to adjustment) — bidder to indicate.
• Price adjustment allowed for non-fixed prices; statutory cost adjustments permitted.
• Rates of exchange and exchange rate fluctuation provisions apply for foreign currency components.

Performance security:

• Performance-Based Security required to secure contractor's obligations.
• Performance Guarantee: bank guarantee for full and due performance.
• Security release upon Final Acceptance.

Insurance: contractor must maintain required insurance (details in contract clauses).

Retention: not explicitly stated in this volume.

CSD registration: implied standard requirement (confirm in Volume 1A).

Tax compliance: SARS tax clearance or tax compliance status PIN implied for state-owned entity contracts.

CIPC registration: required as standard for juristic persons.

B-bbee:

• Prime contractor must have a B-BBEE status level.
• Subcontracting >25% to lower B-BBEE status enterprises prohibited unless to capable EME.
• B-BBEE certificate or sworn affidavit required for preference points (standard PPPFA requirement — confirm specifics in Volume 1A).

CIDB: not applicable (non-construction procurement).

Local content: definitions provided; no minimum percentage stated in this volume — check SBD 6.2 and Volume 1A for threshold.

Professional registrations: not stated; aviation/telecommunications equipment expertise implied by scope.

Data sovereignty: assurances and safeguards required per clause 2.4.6.

Anti-bribery and anti-corruption: contractual obligations apply.

Legal compliance: all applicable South African legislation.

Installation, Transition and Commissioning (ITC) Plans are required as part of the Test and Evaluation Master Plan, weighted at 6% in Volume 3. The ITC Plans must detail the approach for installation, transition from existing systems, and commissioning of the new HF equipment at both sites.

Evaluation criteria (technical functionality) split across three volumes, each totalling 100% weighting:

• Volume 2: General Specifications – key elements: Scope of work (5%), System Interface Requirements (6%), Fallback system (6%), Disaster Recovery (6%), Redundancy (5%), SELCAL System (5%), System Validation Requirements (5%), Computer application for ATC display (5%), Transmitter Stations: Delmas site (6%), Isando Site (4%), RCMMS (4%); Receiver Station: Bapsfontein Receivers (6%), HF Receiver Multi-coupler (4%), RCMMS (4%).
• Volume 3: Project Management – key elements: Relevant Project Experience (10%), Resource Allocation Plan (6%), Master Project Schedule (5%), Contract Data Requirements List (4%), Project Management Plan (4%), Installation, Transition and Commissioning (ITC) Plans (6%), Delivery of Quality QA Plan (5%), Systems Engineering Master Plan (5%), Occupational Health and Safety Plan (4%), Site Survey Requirements (5%), Environmental Management Programme (5%).
• Volume 4: Phases – Development Phase: System Performance Requirements (4%), Support Concept Proposal (4%), ILSP (4%), LSP (6%), RAMP (6%), Training Plan (6%), Spares Plan (6%), Configuration Management Plan (4%); Implementation Phase: Deliverables (6%); Validation Phase: PBU (6%), PBU Verification (6%); Application Phase: Application of Logistic Support Plan; Maintenance and Support Contract Requirements (10%); System Failure Definition and Correction Service Levels (4%).

No minimum qualifying score stated. Preference point system (80/20 or 90/10) not specified in extracted text.

Scope: Supply, delivery, installation, commissioning of HF equipment at Bapsfontein (receiver station) and Delmas (transmitter station) with associated maintenance and support.

Key technical requirements (from Volume 2 weightings):

• General Specifications: Project Introduction, Controller Working Position, Project Overview, Scope of work, System Interconnection Diagram, Environmental Conditions, Reference Documents, Power Requirements, System Lifespan, Modularity and Technology, Redundancy, Operational Concept, SELCAL System, Control Unit, Antenna, Antenna Coupler System, Built-In-Test Equipment (BITE), System Interface Requirements, Maintenance Position, Fallback system, Disaster Recovery, Equipment Cabinet, Software, System Validation Requirements, Computer application for ATC display.
• Transmitter Stations: Isando Site, Delmas site, RCMMS.
• Receiver Station: Bapsfontein Receivers, HF Receiver Multi-coupler, RCMMS.

Project Management deliverables (Volume 3): General Instructions, Relevant Project Experience, Project Management Plan, Project Status Reports, Master Project Schedule, Project Review Meetings, Work Breakdown Structure, Statement of Work, Resource Allocation Plan, Contract Data Requirements List, Resumes of Key Personnel, Technical Reviews, Risk Management Plan, Systems Engineering Master Plan, System Design Review, Test and Evaluation Master Plan, ITC Plans, Quality Assurance Plan, Occupational Health and Safety Plan, Site Survey, Environmental Management Programme, ACSA Permits.

Phases (Volume 4): Development Phase – System Performance Requirements, Support Concept, ILSP, LSP, RAMP, Training Plan (Operational, Technical Maintenance, Hardware), Spares Plan, Test Equipment Plan, Documentation Plan, Package Handling Storage & Transport Plan, Configuration Management Plan, System Lifespan, Interface Control Document. Implementation Phase – Deliverables. Validation Phase – PBU, PBU Verification, Updates. Application Phase – Application of Logistic Support Plan. Contract Data Requirement List (CDRL). System Failure Definition and Correction Service Levels. Maintenance and Support Contract Requirements.

Procuring entity: Air Traffic and Navigation Services Company SOC Ltd (ATNS).

Technical compliance scoring per paragraph:

• C (fully compliant) = 2 points
• PC (partly compliant) = 1 point
• NC (not compliant) = 0 points
• Noted (for information-only paragraphs) = accepted

Mandatory (M) requirements: non-compliance leads to disqualification.

Desirable (D) requirements: bidder must declare compliance level and provide supporting documents.

Information (I) paragraphs: bidder must respond and provide information if requested.

Optional (O) paragraphs: bidder may decide how to respond.

No overall evaluation methodology (price/preference point split, minimum qualifying score) is specified in this volume.

Scope: Turnkey HF system replacement for air-ground communication in South Atlantic (SAT) and Indian Ocean (INO) regions, including search and rescue.

Locations:

• ATC Working Position (FAOR operational complex)
• Bapsfontein receiver station
• Delmas transmitter station (new)
• FAOR technical centre
• Isando transmitter station (decommissioning)
• Disaster Recovery site (FAOR SSS Building)

Key deliverables:

• Environmental Impact Assessments
• Civil works
• Installation of transmitters, receivers, RCMMS, fallback system, disaster recovery duplication
• Decommissioning and disposal of existing HF equipment at Isando
• 15-year maintenance and support agreement

System requirements:

• Modular, solid-state, dual (main/standby) with automatic switchover
• Wideband up to 240 kbps / 48 kHz
• SELCAL 32 (32 tones, 200,000 codes), backwards compatible

Transmitter (Delmas):

• Two TCI-540 antennas, oil-cooled dummy load, RF switch
• Frequency range 3–30 MHz, pre-selected channels, SSB & CW modes
• Two balun matching transformers
• Local/remote control via RCMMS, BITE
• Power amplifier: 4 kW PEP (±500 W), 3rd order IMD ≤ -32 dBc, harmonics ≤ -63 dBc, spurious ≤ -60 dBc (±5%) / -80 dBc (>5%), RF noise >75 dBc/Hz
• VSWR protection up to 3.1, 400/230V 3-phase, internal cooling, modular with built-in PSU
• Carrier suppression ≥50 dB, hum ≤ -60 dB, independent transmitter paths

Receiver (Bapsfontein):

• 7 SAT receivers +1 spare, 5 INO receivers +1 spare
• Frequency range 3–30 MHz, tuning resolution ≤10 Hz, stability ±1 ppm
• Modes: J3E, H2B, A3E, A1A, independent SSB
• Selectivity per ITU, IF filter shape factor ≤2:1
• Sensitivity ≤ -113 dBm (0.5 µV), image/IF rejection ≥80 dB, 3rd order intercept ≥+5 dBm
• Reliable squelch, fast attack/slow decay (adjustable)
• Audio output 600 Ω balanced transformer isolated, adjustable -20 to +10 dBm
• Internal speaker, lightning/surge protection, inherent cooling
• 16-output HF multicoupler

Rcmms:

• Independent remote access per transmitter/receiver
• Control, monitoring, reporting, lightning/surge protection
• Local control: frequency change, keying, emission mode, BITE

Antenna:

• Use existing omni-directional antennas at Bapsfontein and Delmas
• Replace coaxial cables: 220 m each to 2 antennas at Delmas (440 m), 180 m to Bapsfontein (total 620 m)

Antenna coupler: Splitter to share antenna between two couplers

BITE: Tests for receiver/transmitter performance, SELCAL, syllabic mute, VCO, serial port

Interfaces:

• VOIP ED137 via Ethernet RJ45 to VCCS
• IP connection to datalink
• SNMP for control signals to SITTI VCCS

Fallback system:

• Emergency radio at ATC working position and disaster recovery
• Receiver audio on VCCS and fallback with individual volume controls
• Simultaneous access to SAT, INO, SAR, AFI, 7E region frequencies
• Transmitter follows receiver channel selection, dedicated SELCAL unit

Disaster recovery:

• Duplicate operator position at FAOR SSS Building with RCMMS, SELCAL, computer application, fallback
• Not operational simultaneously with main system
• ATNS-provided IP connection

Equipment cabinets: 19" racks, natural heat dissipation, cable management, maintenance access, layout drawings required

Software/security:

• Least functionality, behind firewall/IDS, public access only via firewall, remote access via VPN
• Network security (DMZ, subnet), TLS/IPsec, mobile device security if applicable
• Secure protocols/ports (DNS over 53, secure NetBIOS/IPv6/Bluetooth/WiFi/IR)
• Secure remote access (SSL, SFTP, SCP, VPN, SSH, IPsec)
• User account security: unique usernames, groups, password complexity, MFA, role-based access
• File security: permissions, audit logs, session timeouts
• Data protection: FIPS 140-3 crypto, antivirus/anti-spyware, DLP classification
• Patch management, documentation maintenance

Validation: System must be operationally deployed in at least one ICAO member state

Computer application: Real-time frequency recommendation for INO/SAT based on ionospheric conditions, standalone PC with separate screen at ATC position

Environmental:

• Indoor: -5°C to +55°C, humidity ≤95% (≤35°C) / ≤60% (>35°C)
• Outdoor: -20°C to +60°C, humidity 60%–saturation, altitude 0–2500 m, rainfall 400–2000 mm, wind up to 186 km/h
• Outdoor components: IP65 minimum, hermetically sealed, corrosion protected

Power:

• 400/230V 50Hz 3-phase 4-wire or single-phase 230V AC
• Voltage fluctuation ±10%, frequency deviation ±2 Hz
• Backup power supply per site, under/over voltage/current protection, lightning surge protection
• Internal backup for volatile data, auto-restart after power failure

Lifespan: 15 years for system and components; interventions and costs for 15-year lifespan to be stated and priced

Reference documents: ICAO Annex 10 Vol III, SANS 10142

Technical compliance with:

• ICAO Annex 10 Aeronautical Telecommunications Volume III
• SANS 10142 (Low voltage installations)
• Environmental conditions (temperature, humidity, altitude, rainfall, wind, IP65)
• Power requirements (voltage, frequency, backup, protection)
• 15-year system lifespan
• Modular solid-state design, redundancy, SELCAL 32, wideband capability
• Transmitter and receiver specifications (power, IMD, harmonics, spurious, noise, sensitivity, selectivity, etc.)
• RCMMS, fallback, disaster recovery, interfaces, software security
• Mandatory (M) paragraphs: non-compliance leads to disqualification
• Bidders must declare compliance per paragraph (C/PC/NC/Noted) with supporting evidence

No CSD, tax, B-BBEE, CIDB, CIPC, professional registration, or local content requirements are specified in this volume.