"Victor Fraenckel" wrote in message
...
Paul wrote:
So now I get to figure out how to parse Message Type 16: "Assigned Mode
Command, Assignment of a specific report behaviour by competent authority
using a base station"

Where are these NMEA sentences documented? I would like to add them to my
NMEA sentence parser S/W

Here is a spec that includes the AIS NMEA sentences, and the coding used:

http://www.navcenter.org/marcomms/IEC/80_269e.pdf - this has a description
of the messages, the NMEA encapsulation, and of the 6-bit encoding.

This is a big document, so here is where to find the highlights:
* The message descriptions start in section 7.6.8
* There is an ascii-to-6bit mapping, shown in table 23, that is used to
encode test strings. This is not the same thing as the 6bit-to-ASCII
mapping, so don't get confused (as I did at the start of this string)
* The 6bit-to-ASCII is described starting at section G.3.6
* Examples of AIS NMEA sentences are shown in section G.3.2

-Paul

Correction: "text strings", not "test strings" (see below)


This is a big document, so here is where to find the highlights:
* The message descriptions start in section 7.6.8
* There is an ascii-to-6bit mapping, shown in table 23, that is used to
encode test strings. This is not the same thing as the 6bit-to-ASCII
mapping, so don't get confused (as I did at the start of this string)
* The 6bit-to-ASCII is described starting at section G.3.6
* Examples of AIS NMEA sentences are shown in section G.3.2

-Paul