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Appendix E - AIS connection for MX512 only | 161

manually entered) -

Rate of turn (where available)

Voyage related data

Ship’s draft

Hazardous cargo (type)

Destination and ETA (at master’s discretion)

Safety-related messages

As needed

Dynamic information is derived from interfaces with the ship’s GPS and other sensors.

Static information is programmed into the unit at commissioning. Voyage-related data is

entered manually by the master through a password-protected routine. Safety messages

can be inserted at any time by the ship or shore station.

The static and voyage-related data are transmitted every six minutes, when amended or

on request (for instance, when interrogated by a Vessel Traffic System operator). Safety

messages are sent as needed. The update rates for dynamic information will depend on

the ship’s status and speed, according to the following schedule:

Dynamic information schedule

At anchor 3 minutes

0-14 knots 10 seconds

0-14 knots and changing course 3.3 seconds

14-23 knots 6 seconds

14-23 knots and changing course 2 seconds

23+ knots 2 seconds

23+ knots and changing course 2 seconds

he AIS specifications also allow for insertion of brief binary messages from ships or

shore stations. Such messages might include notices to mariners, navigational warnings,

tides and currents, weather forecasts, SAR communications and ship-specific instructions

from a VTS operator. The AIS standard also includes formats for transmission of

differential GPS error correction data. This can provide valuable redundancy to existing

beacon DGPS systems in critical navigation areas.

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Memorex RX 1 Smart Installationshandbuch Seite 163