[TG] [TG11] No Fix, TX timeout at fixed time

[Crossroads]

Hello Tom

Thank you for the quick reply.

We are at anchor and only the nav data from wind and underwater sensors are on. The MFD, sat phone, radar and inmersat C are off, which antennas are located on the same pole.

0.33 nm NNE of us is a huge bridge of max 103m heigh and 1782m long. For the rest no high buildings anywhere close. Mostly some mangrove bushes.

I had a look when the problem occurred via the ProAIS and discovered that normally there are 5 Navigation satellites with signal level of mostly just below 40. When the fix is lost, there are only 4 satellites. Sometimes a non-navigation satellite becomes a navigation one and the fix is back. Sometimes one nav sat shows up below the 30 before becomming stronger and the fix is back.

Could it be that around a certain time, one satellite might be on a dificult location and at sea the interferance of other instruments or construction might cause a fix loss, and at anchorage the big bridge might cause the fix loss that can last 30min.

We leave next week and I will monitor what happens at sea and when we move into the Northern hemisphere.

Thank you