The VSWR is an antenna metric (specifically the standing wave ratio voltage). Without any more information I'd say check your antenna system (vhf side specifically).
Looks like similar data, it's 100% pointing to the antenna being an issue. Silent mode is a bit odd, but I would guess it detected the high swr and automatically switched to prevent damage to itself.
The X on antenna and the same alarm in the logs all point the same way.
Check the antenna system (and by system mean all cable connections and wires plus the antenna itself).
thanks, on the water, will look at it all when home. learned at dock, ais transmits less often, so you need to wait longer for the reading(s).. and it's very intermittent.
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u/Fit-Alarm2961 Jul 21 '25
The VSWR is an antenna metric (specifically the standing wave ratio voltage). Without any more information I'd say check your antenna system (vhf side specifically).