They're mostly AIS receivers for the smaller vessels rather than tranceivers, but yes, that is true (for a boat the size I'd estimate this was it likely had a t

They're mostly AIS receivers for the smaller vessels rather than tranceivers, but yes, that is true (for a boat the size I'd estimate this was it likely had a tranceiver). You also can very easily turn AIS off onboard if you don't want to be tracked, whereas there's less danger of someone sneaking onboard to look at the nav system so that might have been left on. edit I just re-read your comment and realised I missed most of it somehow. It's late here, and you were spot on, sorry! edit edit Also, It's an older code sir, but it checks out.