[CA] [CA11] AIS 700 stopped transmitting positions

[Nokay]

I got a VSWR meter and things seem to check out ok (I measured 1.0:1). The voltage into the unit was also OK. But during this investigation I found a way to "fix" and reproduce the issue:

Note: I had my unit permanently connected via USB to a boat laptop.

To fix:

- Power down the unit (i.e., disconnect standard power connection) AND disconnect the USB connection.
- Switch power back on.
- Reconnect USB.
- Unit would go "all green" and begin transmitting after the standard duration.

To reproduce:

- Power down unit *while leaving USB connected (to active Laptop)*.
- Unit immediately switches into error mode. Even without main power, LED remains red.
- Even powering unit back on (leaving USB connected at all times) does not bring unit out of error mode. The unit was in this state when I sent my initial post.

So it seems my AIS (possibly all AIS) don't like to be powered down while still being connected to the USB.

It seems like a bug to me that my unit does not recover even when main power is restored, while connected to the USB.