Hi Phil,

[snip]

> Yes and yes! Single box and with a interfaces into the ship electronics.

These

> come in as NMEA packets into a serial port.

In a german newsgroup was a similar problem.
After some testing the result was,
errors occured from time to time when the interface-program
was running while data been send to the server.

After the interface-program was changed
( to TurboPower Async. Professional)
the problem was gone.

Maybe you should do some testing there.

HTH
Achim