Changeover Command (encrypted)
Introduction/Additional information:
This ASM implements the Project 25 OTAR Changeover Command message.
Usage Notes
- This message is sent from the Key Management Facility to the Mobile Radio (MR) to support the change of the active keyset(s) at an MR or group of MR.
- This message instructs a MR to start using an already held keyset. Thus, this message must be preceded by a successful Modify Key transaction.
- This message is broadcast as a non-addressed message, to reduce the message size, and to avoid issues from a relocated RSI to a different MMSI.
- The “Subsequent Changeover” field is optional and unlimited per Project 25. In order to limit message size to 5 slots, the count of instructions is limited to 35 per message.
Version 0:
This is an RTCM compliant implementation of the Project 25 OTAR Changeover Command. This ASM only has an AIS Message 26 variant.
Permitted as from:
12/05/2016
Registrant:
USCG
Physical link:
AIS
DAC or VPFI:
366
FI / Message ID:
21
Version:
0
State:
in force
Number of slots (max):
3
Last modified:
29/01/2021 - 23:19