AIS Transponder (Class A) · Navigation & Bridge Equipment
The Furuno FA-170 is a Class A AIS transponder, named U-AIS Transponder in the brochure. It handles 2250 reports per minute on one channel and 4500 reports per minute on two channels. Listed standards include IMO MSC.74(69) Annex 3, MSC.302(87), A.694(17) and MSC.191(79), together with ITU-R M.1371-5, IEC 60945 Ed. 4 and IEC 61162-1 Ed. 4. The TX/RX range is 156.025 to 162.025 MHz at 25 kHz bandwidth, output power is selectable between 1 W and 12.5 W, and the DSC receiver is fixed on 156.525 MHz, channel 70. The built-in GPS receiver tracks 12 satellites, and position accuracy is less than 13 m for GPS and less than 5 m for DGPS.
The transponder unit has 6 input/output COM ports, 3 input-only SENSOR ports to IEC61162-1 Ed. 4 and 1 LAN port to IEC61162-450 Ed. 1. AIS data is output to ECDIS, radar and other navigational equipment, with enough ports for a dual ECDIS and radar configuration. The unit is BAM (Bridge Alert Management) ready and meets the alert requirements of IMO MSC.302(87). The target list stores as many as 2048 targets including AIS-SARTs, and the monitor unit has a 4.3-inch color LCD. The transponder unit takes 12-24 VDC at 6-3 A, and the optional PR-241 power supply unit runs on 100/110/200/220 VAC.
The transponder unit weighs 3 kg and the monitor unit 0.7 kg in the hanger version or 0.6 kg flush mounted. Degree of protection is IP22 at bulkhead mount and IP20 at floor for the transponder unit, IP22 for the monitor unit (IP35 with the waterproofing kit OP05-139) and IP56 for the antennas. Ambient temperature is -15 to +55 degrees C for the units and -30 to +70 degrees C for the antennas. Options include the VHF antenna CX4-3/FEC, the pilot plug unit FA-1703 and the monitor flush mount kit OP05-140 for retrofitting from the FA-150.
Sources: Furuno brochure FA-170, checked 05.10.2026
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Furuno FA-170 U-AIS Transponder for marine communication and safety.
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Check the antenna, GPS input, static data and the interface to the navigation displays at the annual survey. Confirm the transponder shows nearby ships and is received by a second AIS.
Keep spare fuses, the VHF antenna cable and the data cable to the bridge systems on board. Order further parts through the maker or its authorised service network.
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