I waved! I must say I am a bit envious of you over there ping, what a lovely place. If you let us know nezt ine you head
off down the channels I can see how well S-ais works on your boat.
The issues (as I understand it) with normal CSTDMA class B signals is that they get swamped by the much stronger and more frequent class A signals. I think the sats can handle all the class A traffic in the footprint no problems, but its only chance when a weak class B CSTDMA signal happens to transmit in a timeslot that is empty. The new SOTDMA class B units should have a much better chance of transmiting in a free time slot by reserving one in advance in the local area.
This is all theory, at this stage satellite
tracking of a standard CSTDMA class B unit with a normal antenna
seems viable in the south pacific
. As long as you are not two worried about lag, and are happy with only a handfull of reports per day.
It would be interesting to see if it works so well in the more crowded north atlantic and asian areas.
I see big implications of this in the future. I dont think border control is going to let this technology disappear. I can see a future where AIS is required for all overseas yachts checking in. Or if tou dont have it more onerous position reports might be needed.
On the plus side they may make clearing in easier if they can verify your track.. I suppose if you are up to no good you could fudge the GPS
data sent by the AIS?