I have a Seiwa explorer 3 plotter on board with external "smart" antenna
costing several hundred dollars that loses signal several times a day.
When its working it tracks a dozen sattelites but rarely more than 4 are green (good signal)
I suspect the antenna
is on its way out.
I also have opencpn
beside it on laptop
using a $15 gmouse USB antenna running inside.
It never drops out, nor does my $40 phone
or $100 tablet with navionics
As I suspect the Seiwa antenna is on its way out and am loathed to spend $300 or more on a replacement when the $15 gmouse works so well I am wondering if I can get another gmouse, cut the seiwa and gmouse cords and rejoin together.
Then carry several gmouse spares.
The seiwa has a 6 pin plug
with 4 pins being used
Not sure what wires run to USB plug