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F
Dimensions of ship - to nearest meter.
F
Location on ship where reference point for position reports is located.
Type of position fixing device - various options from differential GPS to un-
F
defined.
Draught of ship - 1/10 meter to 25.5 meters [note "air-draught" is not pro-
F
vided].
F
Destination - 20 characters are provided.
1.3.9.
AIS Frequencies
The International Telecommunications Union World Radio Conference in 1997 desig-
nated two VHF radio frequencies: 161.975 MHz (AIS1, or channel 87B) and 162.025
MHz (AIS2, or channel 88B) for AIS. In the US, the first channel is owned by Mari-
TEL, a public coast station operator, and the second by the federal government. The
USCG signed a Memorandum of Agreement with MariTEL for use of AIS 1, and has
authority from the National Telecommunications and Information Administration to
use both AIS1 and AIS 2 US-wide for AIS operation. The USCG has asked the Fed-
eral Communications Commission to authorize any US vessel to operate AIS on
these two channels under its existing ship station license. The FCC released a No-
tice authorizing operation of AIS under a ship's existing station license.
1.3.10.
AIS Input Sentences
This section lists the input sentences received by the L-3 ProTec AIS Transponder.
The input sentences are categorized as Pilot, Long Range, and Sensor, which are
listed as follows:
Pilot
ABM, BBM, AIR, VSD, SSD, ACK, ACA, AIQ
Long Range
LRI, LRF
Sensor
RMC, VTG, ROT, HDT, GNS, GLL, GGA, GRS, GSA, GST, GSV, ZDA, GBS, DTM,
VBW
Initial Issue
Page 1–12
Aviation Recorders
Marine Systems
165M0601-00
Feb. 01/05
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