Attachment 3 - SRD_NexGen Radar_v2.0_20250225_RFI C2PL2503.docx

Coast Guard Next Generation Surface Search Radar System Requirements

Coast Guard Next Generation Surface Search Radar System Requirements Document (SRD) Version 2.0 25 February 2025

RFI 70Z04425IC2PL2503

Attachment 3 - SRD

CG Next Generation Surface Search Radar System Requirements v2.0

Table of Contents

1. Introduction……………………………………………….…………………………………

1.1 System Purpose and Overview………………………………….…………………..1

1.2 Hardware Specifications………………………………………….…………………..1

1.3 Hardware Compliance…………………………………………………………………4

1.4 Human Factors Design………………………………………………………………..6

1.5 Alerts, Indications and Notifications………………………………………

1.6 Definitions, Acronyms and Abbreviations…………………………………………..8

1.7 Standards and References………………………………………….……………….12

2. Document Description………………………………………………………………………..14

2.1 Requirements Conventions…………………………………………………………..14

2.2 Requirements Verification Method………………………………………………….14

3. Overview of Next Generation Radar Requirements…………………………………...15

Annexes:

Annex A: Next Generation Radar System Requirements Annex B: Navigation Symbology Annex C: ARPA Symbol to MIL-STD-2525D Symbol Name Conversion Annex D: Command and Control System via COMRIC Radar Data Protocol Annex E: IEC 62388 Annex I – Radar Control Function/Indication Grouping Annex F: Radar Sensors NMEA 0183 to NMEA 2000 Crosswalk

CG Next Generation Surface Search Radar System Requirements v2.0 ii

RECORD OF CHANGES

1 Introduction This document defines system requirements for a Next Generation Surface Search Radar System to be adopted as the Coast Guard’s Surface Search Radar (SSR) System of Record.

This document will be updated as necessary to edit existing requirements. The Next Generation Radar specifications contain requirements identified as “Objective.” These requirements are the preferred system capabilities and will be evaluated based on degree of benefit provided. All other specifications contained herein are the minimum required specifications (Threshold).

1.1 System Purpose and Overview

This SSR will serve as the primary collision avoidance system, providing safe navigation and surveillance for Coast Guard cutters and shore units and be IMO certified. (i.e. AN/SPS-(50/78/79/VTS)).

1.2 Hardware Specifications

· Primary System Hardware:

· Flat Panel Display:

· All flat panel displays must adhere to the specifications outlined in IMO MSC.191(79) as detailed in section 1.2.2 regarding Radar Display Unit Size/Type Requirements.

· System shall have a standalone display option that measures no more than 19 inches diagonally for installations without a SAOP.

· System shall have a standalone display option that measures no more than 23.1 inches diagonally for installations without a SAOP.

· The flat panel display shall accept video input exclusively through digital video connectors, meeting industry-standard protocols for digital video transmission.

· Objective: Flat panel display must prioritize compatibility with DisplayPort technology for optimal performance and integration with radar systems and KVM configurations.

· Stand Alone Operator Position (SAOP):

· System shall use existing shipboard mounting plate foundation in lieu of welding new hardware to deck. (Foundation footprint: 28in (W) x 26in (D)

· Multi-Mission Console:

· System shall be able to be installed in an existing console or rack without a SAOP.

· X-Band Turning Unit:

· System X-Band Shall have an antenna array length option not to exceed 8 ft in length.

· System X-Band Shall have an antenna array length option not to exceed 6.5 ft in length.

· System shall have an option where the turning unit and array will weigh no more than 125 lbs.

· S-Band Turning Unit:

· System S-Band Shall have an antenna array length option not to exceed 9 ft in length.

· Processor Unit:

· Ice Breakers Only: The system shall detect sea ice by electronic characteristics including relative thickness, pressure ridges, and areas of open water.

· Processor shall have a means of sector blanking.

· Objective: Shall fit in a standard 19” rack located remotely from the existing radar console

· Objective: Shall not exceed 4 RU in height and be no more than 17 inches x 7.5 inches x 19 inches including connecting devices, cables, and connectors.

· Objective: Main cable that connects the antenna turning unit to the processor shall be located on the processor’s rear (side facing the 19” rack)

· Uninterruptible Power Supply (UPS):

· UPS shall be approved for shipboard environment.

· UPS shall be approved for shipboard power.

· UPS shall provide 30 minutes of backup usage at a 50% load.

· Processor Interfaces:

· X-Band Turning Unit:

· Processor shall connect to the X-Band Turning Unit

· Turning Unit cable shall be low smoke shipboard rated and compatible with a 90-degree cannon plug or equivalent IAW MIL-DTL-5015H.

· S-Band Turning Unit:

· Processor shall connect to the S-Band Turning Unit

· Turning Unit cable shall be low smoke shipboard rated and compatible with a 90-degree cannon plug or equivalent IAW MIL-DTL-5015H

· Data Output:

· The system shall interface with Command and Control systems via radar open standard protocol.

· Objective: The system shall interface with Command and Control systems using the messages in Annex D (Command and Control System Communication via COMRIC Radar Data Protocol) via the COMRIC radar data protocol.

· Objective: Radar processor shall have a means of outputting analog radar pulses (i.e., video, trigger, Azimuth Reference Pulse (ARP), and Azimuth Change Pulse (ACP)).

· Navigation Equipment:

· Processor shall interface with existing navigational equipment (e.g., GPS, Electronic Charting System, AIS) via NMEA 0183 to enable data exchange and communication.

· Objective: The processor shall interface with existing navigational equipment (e.g., GPS, Electronic Charting System, AIS) via NMEA 2000 to enable data exchange and communication.

· Objective: The processor shall interface with existing navigational equipment (e.g., GPS, Electronic Charting System, AIS) via NMEA OneNet to enable data exchange and communication.

· Audible Alarm:

· Processor shall be capable of providing the appropriate signal or voltage necessary to drive the speaker/buzzer at the operator position.

· Keyboard:

· System shall accept the capability of a QWERTY keyboard.

· Objective: System shall use USB QWERTY keyboard.

· Trackball:

· Processor shall be capable of utilizing a trackball.

· Objective: Processor shall use a USB trackball.

· Display:

· Processor shall output video via industry standard digital video connector (e.g., HDMI, DisplayPort, DVI).

· Maintenance Interface:

· Processor shall include physical interface for maintenance tech to perform maintenance and troubleshooting on the radar.

· Objective: VTS Only: Radar shall have capability to perform maintenance and troubleshooting remotely.

· Antenna Safety Switch:

· Processor shall have a physical antenna safety switch that can be mounted remotely from the processor at the base of the mast.

· Objective: Processor shall integrate with existing antenna safety switch and safety switch circuit (12V). (Manufacturer: Raytheon, P/N: 1721801-100)

· VTS Only: Physical switch shall be located at the remote site.

· AN/SLA-10B:

· Processor shall interface with the AN/SLA-10B where applicable.

· Vendor shall provide the appropriate connector.

1.2.1 AN/SLA-10B Interface Pre-trigger Specifications

· Pulse Amplitude: +10 to +50 volts peak.

· Pulse Width: 0.25 to 20 microseconds, not adjustable.

· Pulse Repetition Rate: 270,000 pulses per second (max).

· Rise Time: 0.1 microseconds (max).

· Duty Cycle: 75 percent (max).

· Impedance: 125 ohms (nominal).

· Timing: Fixed to 50+ 0.5microseconds delay pulse ahead of the radar main bang for all pulse widths.

· Timing Stability: ± 0.25 microseconds with respect to the transmitter RF pulse.

1.2.2 Radar Display Unit Size/Type Requirements

The display unit size must accommodate the CAT 1 Category operational display area diameter for all CG Cutters, in accordance with IMO MSC.191(79):

Category of ship/craft

The minimum number of radar displays for each cutter by cutter size is listed as follows, in accordance with Memorandum from COMDT (CG-761) dated 03 OCT 2018, MINIMUM REQUIREMENTS FOR DISPLAY OF NAVIGATION-RELATED INFORMATION AT NAVIGATION WATCHSTANDER POSITIONS ABOARD CG CUTTERS AND BOATS:

There is no display unit size requirement for a VTS. PAWSS computer screens will be the main display. A rack mounted display will be at VTS sites. The display must fit within the rack at the remote sites.

1.3 Hardware Compliance

· Withstand motions and accelerations associated with high-speed semi-displacement vessels operating in severe marine environment.

· The system shall allow the user to operate all controls with gloved hands, IAW MIL-STD-1472 REV. H Design Criteria. Operable by crewmembers wearing gloves or CBRNE protective and cold weather hand wear (e.g. 4210-01-335-7905: Firemen's Gloves)

· Comply with IEC 60945: Chapter 5 for methods of testing and required test results.

· Display Units:

· Comply with IEC 60529 Ingress Protection (IP) 55

· Display intensity control that allows displays to be visible in direct sunlight

· Display intensity control that allows displays to be visible at night without loss of night vision

· Usable while the user is wearing glasses/sunglasses with polarized lenses

· Radar Antenna Units:

· Shall comply with IEC 60529 IP 56

· Spectrum Certification through NTIA

· Marine grade power supplies

· Shall comply with NAVSO P-3641A Sections 1-3

· Marine grade power converters

· Shall comply with NAVSO P-3641A Sections 1-3

· Capable of operating 3,500 operational hours (minimum) per calendar year

· Have a Mean Time Between Failure (MTBF) of 16,000 hours minimum.

1.3.1 Environmental, Excluding Video Displays

· Ambient Temperature

· Operating ambient temperature shall be IAW IEC 60945 Section 8.4.2.

· Externally Mounted Equipment: -25 °C to +55 °C.

· Objective: Externally Mounted Equipment shall operate at a maximum air temperature of +60 °C .

· Objective: Externally Mounted Equipment shall operate at a minimum air temperature of -40 °C.

· Objective: Externally Mounted Equipment shall survive at a minimum temperature of -57 °C.

· Internally Mounted Equipment (all equipment other than the pedestal and array): -15 °C to +55 °C

· Non-Operating ambient temperature shall be IAW IEC 60945 Section 8.2.1

· All equipment: +70 °C

· Electromagnetic Interference (EMI) / Radio Frequency Interference (RFI)

· Comply with IEC 60945 Sections 9 and 10 for EMI and RFI

· Equipment shall be of a type authorized by Federal Communications Commission (FCC). Specifications for limitations of electrical interference may be found in the FCC Rules

· Relative Humidity

· Equipment shall be capable of operating in 95% humidity at 40° C IAW IEC 60945 Section 8.3.1

· Shock

· The system shall meet the requirements for shock as detailed in MIL-DTL-901E, Grade B for medium weight equipment.

· Vibration

· All equipment: IAW IEC 60945 Section 8.7

· Rain and Spray

· All equipment exposed to elements that are mounted above deck: IAW IEC 60945 Section 8.8

· Electrical

· Equipment shall be capable of normal operation when encountering the following normal variations of the input power supply:

· Variation from nominal voltage by +/- 10%

· Variation from nominal frequency by +/- 6%

· Uninterruptible Power Supply (UPS)

· Shall fully energize the system for a minimum of 30 minutes following loss or interruption of external electrical power at a 50% load.

· Shall be approved for shipboard environment and power.

· Shall have an input voltage of 120VAC

· Shall have an input frequency of 60Hz

· Shall have an output voltage from 110VAC to 120VAC

· Shall have an output frequency of 60Hz

· Objective: Shall be mountable in a standard 19" server rack system

· Objective: Shall have dimensions of no more than 17 inches x 7.5 inches x 19 inches

1.3.2 Environmental for Video Display Monitors

· Ambient Temperature

· Operating ambient temperature shall be IAW IEC 60945 Section 8.4.2

· Internally Mounted Equipment: -15 °C to +55 °C

· Non-Operating ambient temperature shall be IAW IEC 60945 Section 8.2.1

· All equipment: +60 °C

· Electromagnetic Interference (EMI) / Radio Frequency Interference (RFI)

· Comply with IEC 60945 for EMI and RFI

· Comply with RTCM 13700.0 for EMI and EMC

· Equipment shall be of a type authorized by Federal Communications Commission (FCC). Specifications for limitations of electrical interference may be found in the FCC Rules

· Relative Humidity

· Equipment shall be capable of operating in 95% humidity at 40° C IAW IEC 60945 Section 8.3.1

· Water Intrusion

· Internally Mounted Equipment shall have an IP Rating 66 IAW IEC 60529 or better

· Electrical

· Equipment shall be capable of normal operation when encountering the following normal variations of the input power supply:

· Variation from nominal voltage by +/- 10%

· Variation from nominal frequency by +/- 6%

1.4 Human Factors Design

The system shall comply with the following sections of Department of Defense Design Criteria Standard – Human Engineering (MIL-STD-1472H) for acquisition of Commercial-off-the-shelf (COTS) Subsystems, Non-Developmental Items (NDI), and Developmental Systems:

· 4.2.2 – Performance degradation. Military systems, equipment, and facilities should minimize factors that degrade human performance or increase error.

· 4.3 – Standardization. Controls, displays, marking, coding, labeling, and arrangement schemes (equipment and panel layout) shall be uniform to the greatest extent possible for common functions of all equipment and systems.

· 4.7.1 – Equipment simplicity. The equipment shall represent the simplest design consistent with functional requirements and expected operational conditions.

· 5.17.15.2 – Readily usable form. Information shall be presented to the user in a directly usable form that does not require the user to transpose, compute, interpolate, or mentally translate the information into other units, number bases, or languages.

1.5 Alerts, Indications and Notifications

Alert: Announcement of an abnormal situation or condition requiring attention. Alerts are divided into three priorities: alarms, warnings and cautions. An alert provides information about a defined state change in connection with information about how to announce an event in a defined way to the system and the operator.

Alarm: Alert requiring immediate attention and immediate action by the bridge team to maintain the safe navigation of the ship.

Warning: Alert requiring immediate attention, but no immediate action required by the bridge team. Warnings are presented for precautionary reasons to make the bridge team aware of changed conditions which are not immediately hazardous but may become so if no action is taken.

Caution: Alert which does not warrant an alarm or warning condition, but still requires attention out of the ordinary consideration of the situation or of given information.

Alert Categories:

Category A Alerts. Category A alerts are specified as alerts where graphical e.g., radar, ECDIS, information at the task station directly assigned to the function generating the alert is necessary, as decision support for the evaluation the alert related condition.

Category A alerts should include alerts indicating:

· Danger of collision (with ownship).

· Danger of grounding (with ownship).

Category B Alerts. Category B alerts are specified as alerts where no additional information for decision support is necessary. Category B alerts are all alerts not falling under Category A.

Indications: Display of regular information and conditions, not part of alert management.

Indication: Display of routine information or conditions.

Important Indication: Display of information with low integrity or invalid information.

Notification: Display of non-navigation issues (i.e., Display of any issue not covered in IEC 62288 Table 2).

Refer to International Standard IEC 61924 section 8.3 for Alert Priorities and Categories.

Refer to International Standard IEC 62288 Table 2 for the Presentation of Alerts & Indications.

1.6 Definitions, Acronyms and Abbreviations

1.6.1 Definitions

Operational Display Area (ODA)

An area of the display used to graphically present navigational information and used primarily for navigational purposes.

1.6.2 Acronyms and Abbreviations

1.7 Standards and References

Coast Guard Surface Search Radar systems conform to national and international standards by inheriting requirements directly from the cited standards. Where deviations and additions are intended, the deviation or addition is specifically detailed in the Coast Guard New Radar requirements set. The following standards form a part of this specification to the extent specified herein:

· Coast Guard Navigation Standards Manual, COMDTINST M3530.2 (series)

· NMEA Standard 0183 Version 4.30 or greater

· NMEA Standard 2000 Edition 3.000 or greater

· NMEA Standard OneNet Version 1.001 or greater

· MIL-STD-810H: Environmental Engineering Considerations and Laboratory Tests

· MIL-STD- 167-1A: Mechanical Vibrations of Shipboard Equipment (Type I - Environmental and Type II - Internally Excited)

· MIL-STD-1472H: Department of Defense Design Criteria Standard – Human Engineering

· MIL-DTL-5015H: General Specification for Circular Threaded Connectors

· ASTM Designation: F 1337-10 (2010): Standard Practice for Human Engineering Program Requirements for Ships and Marine Systems, Equipment, and Facilities

· IEC 60945 Ed. 4 (2002): International Standard on Maritime Navigation and Radio Communication Equipment and Systems

· IEC 61108-1 Ed. 2 (2003): International Standard on Maritime Navigation and Radio Communication Equipment and Systems – Global Navigation Satellite System (GNSS)

· IEC 61162-1 Ed. 5 (2016): Maritime navigation and radiocommunication equipment and systems – Digital interfaces - Part 1: Single talker and multiple listeners

· IEC 61162-3 Ed. 1 (2008): Maritime navigation and radiocommunication equipment and systems-Digital interfaces - Part 3 Serial data instrument network

· IEC 61924-2 Ed. 1 (2012): Maritime navigation and radiocommunication equipment and systems – Integrated navigation systems – Part 2: Modular structure for INS - Operational and performance requirements, methods of testing and required test results

· IEC 61993-2 Ed. 3 (2018): Maritime navigation and radiocommunication equipment and systems – Automatic identification systems (AIS) – Part 2: Class A shipborne equipment of the automatic identification system (AIS) – Operational and performance requirements, methods of test and required test results

· IEC 62288 Ed. 3 (2021): Maritime navigation and radiocommunication equipment and systems – Presentation of navigation-related information on shipborne navigational displays - General requirements, methods of testing and required test results

· IEC 62388 Ed. 2 (2013): Maritime navigation and radiocommunication equipment and systems - Shipborne radar - Performance requirements, methods of testing and required test results

· NAVSO P-3641: Navy Power Supply Reliability Design & Manufacturing Guideline

· Federal Radionavigation Plan (2019)

· EAIS IDD v5.5.5

· EAIS IDD v4.6.6

· RTM Standard 13700.0 (2022) for Electromagnetic compatibility requirements for light emitting diode (LED) devices and other electrical and electronic equipment in vicinity of shipboard antennas for the protection of onboard receivers

2 Document Description

· Annex A contains the detailed Coast Guard New Radar system requirements. This annex will be updated as necessary to edit existing requirements. All requirements in this annex are threshold requirements unless indicated as objective by an “O” in the “O” column to the right of the requirement.

· Annex B contains the symbology specification for DSC targets and AIS Base Stations.

· Annex C contains a table converting the ARPA symbol name to the MIL-STD-2525D symbol name.

· Annex D contains a table showing the radar data protocol used by a Command and Control system via COMRIC.

· Annex E contains the Radar Control Function/Indication Grouping requirements from IEC 62388.

· Annex F contains a conversion table for converting NMEA 0183 sentences to NMEA 2000 Parameter Group Number (PGN) messages.

2.1 Requirements Conventions

The following conventions are used throughout this document:

· An “either-or” statement should be interpreted to mean that the system shall have the capability to select between the stated tasks. Therefore, the system is required to have the capability to do both.

· An “or” statement should be interpreted to mean that the system shall be capable of performing one of the tasks, but it is not required to be capable of performing both.

· An “and” statement should be interpreted to mean that the system shall have the capability to perform each task listed. “And” does not necessarily imply that the tasks shall be performed simultaneously.

· “The system shall …” should be interpreted to mean that the task shall always be performed under the stated conditions.

· “The system shall have the capability to …” should be interpreted to mean that the system shall be able to perform the task; however, the execution of the task is dependent on some other system input, including user entry.

· “The system shall allow the user to…” should be interpreted to mean that the task requires interaction with the user.

· The system shall also have the capability to perform any underlying task associated with the stated requirement. For example, if the requirement is to provide the user with the ability to select a navigational sensor, then that requirement also includes the system’s capability to “switch” to the selected sensor.

· The requirements are written with a hierarchical structure. Lower-level requirements either fully specify a higher-level requirement (i.e., the higher-level requirement is met when all the lower-level requirements have been met), further specify some aspect or condition of a higher-level requirement (i.e., the higher-level requirement will not be met by only meeting the lower-level requirements) or is a combination of previously described hierarchical convention.

2.2 Requirement Verification Method

The verification method for each requirement may include inspection, analysis, demonstration, and formal test. The following is a brief description of each verification method:

Inspection: Inspection shall be performed on design, certification, and other system documents to ensure compliance with the requirements. Inspection may also be performed as part of analysis, demonstration, and formal tests.

Analysis: Analysis shall be used when formal testing is not required or is not feasible. Analysis includes modeling and simulation, and may also include the analysis of inspection, demonstration, and formal test results.

Demonstration: Demonstration is similar to formal testing but is informal in nature. Demonstration may be precursors to formal tests and may allow for more expediency in the design, prototyping, and production of the system. Demonstration may include inspection and analysis and may be a component of a formal test.

Formal Test: Formal tests include developmental testing to ensure the system meets the functional requirements.

3. Overview of Next Generation Radar System Requirements The New Radar system will allow the user to safely navigate under normal and degraded operational conditions (i.e., poor weather, restricted visibility, equipment malfunction, etc.).

New Radar requirements are grouped by function into the following sections:

· 1 CG Specific: Targets; tracking targets; antenna performance; display of SART data; send/receive data via NMEA, software development kit; video output; ECM blanking; Automatic Direction Finder (ADF).

· 2 Performance: Transmission; performance optimization and monitoring; gain and anti-clutter functions; signal processing; operation with SARTs, target enhancers (RTEs) and beacons; minimum range and range compensation; range and bearing discrimination; target detection performance assessment; radar antenna (including pitch and roll); radar availability – standby and transmit.

· 3 Display Presentation: Video; display characteristics; symbols; track classification symbols; track labels.

· 4 CCRP and Own Ship: Consistent Common Reference Point (CCRP); own ship.

· 5 Navigation Tools: Units of measurement; presentation; display range scales; variable range marker (VRM); electronic bearing line (EBL); cursor; offset measurement of range and bearing; parallel index lines (PI); bearing scale; range rings.

· 6 Orientation, Motion and Stabilization: Azimuth orientation; motion modes; off-centering; ground and sea stabilization.

· 7 Aids for Collision Avoidance: Target trails and past positions; target tracking; Automatic Identification System; radar and AIS target data; operational target alerts; target association; trial maneuver; trial intercept solution.

· 8 System Setup: Perform setup; assign operator control; configure system interconnection; display interconnection; display control level assignments; ensure control levels assignments are active.

· 9 Control Levels: Control of primary and secondary processed radar image; types of control for primary and secondary operator positions.

· 10 Ergonomic Criteria: Operational controls; primary controls; control properties; default control setting and saved user control settings.

· 11 Interfacing: Input interfacing; output interfacing.

· 12 Characteristics: Parameter defaults; fault diagnosis and servicing; display design; transceiver design; antenna design; safety – antenna and radiation.

· 13 Alerts and Failures: General; backup and fallback arrangements.

· 14 System Interfaces: X-band antenna turning unit with array; S-band antenna turning unit with array; navigation sensors processor interfaces.

· 15 External Interfaces: Command and control system; AN/SLA-10B Interface.

· 16 Maintenance: Built-In Test (BIT).

Annex A CG Next Generation Radar System Requirements

X

X

X

a) TCOMM ADF, TC-525/USCG

b) IES-KDF-500 RDF

c) TC-5025 RDF

d) RT-500 RDF

a) frequency

b) bearing

c) time

d) own ship position in latitude/longitude coordinates

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

Note: Images are referred to as primary and secondary processed radar images.

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X