Equipment My first out of air situation

[scubadada]

Hmm, I DO appreciate the y=mx+b comment...that is my native language. And the problem seems to be mostly m.
If it were mine, I'd first try getting an RMA from Huish before trying to fiddle the electronics:

"All returns, service, warranty, and exchanges require a return merchandise authorization (RMA). To submit a request for an RMA, please send the following information to TAC@huishoutdoors.com:​

​

1. Dealer/customer number (if available)
2. Product information and specifications (i.e. part number, model, size, color, serial number, etc.)
3. Reason for return"

Good luck! Always nice to have a trustworthy spare, instead of something you'd only use on a pony.

That is a good idea, but I don't think Huish will service Aqualung transmitters, serial number prefix FC or FO rather than BM. Of course, nothing to lose by sending the information to Huish by email.

Question Post in thread 'Serial number prefixes on Pelagic Pressure Systems MH8A transmitters'

Mar 11, 2025

I communicated with Huish in January. They still service BM prefix transmitters except for flooding, which includes failure of the OPV. Here are 2 messages from Huish, the second to clarify flooding:

• scubadada

 

[Hatul]

i've not gone over every reply, but the question is what was the tank pressure when you got back on the boat. If the tank still had air it points to a blockage in the air flow, if the tank was empty it means you had a leak or the pressure gauge was bad.

And I agree with others that you should have immediately accepted the divemaster's octo when you found it hard to breathe.