Negative Acknowledgement (encrypted)

Introduction/Additional information: 

This ASM implements the Project 25 OTAR Negative Acknowledgement message.

Usage Notes

  • This message is sent from the Key Management Facility to the Mobile Radio (MR) to respond to a Respond Kind 3 message which the receiving end does not understand, or has invalid message attributes (ID, number or MAC).
  • When this response is received, it is assumed it refers to the most recent message sent.
  • 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.

Version 0:

This is an RTCM compliant implementation of the Project 25 OTAR Negative Acknowledgement Message.

This ASM only has an AIS Message 26 variant.

Permitted as from: 
12/05/2016
Registrant: 
USCG
Message number: 
26
DAC: 
366
FI: 
25
Version: 
0
State: 
in force
Number of slots (max): 
3
Last modified: 
20210129T231915