On Mon, 07 Jul 2008 05:33:05 -0700, Josh Assing
wrote:

I think that's how it works. Unless you have some sort of proprietary
equipment that uses a hinky system.

Doesn't appear to be the case -- For example: Furuno device (navtex) accepts zda
but doesn't even look at RMC...

Hmmmmm - Well, nothing for it then - I must consult the High Holy Book
of NEMA Data Sentences...

TO THE WAVE CAVE!!!

Ok, the ZDA sentence:

$GPZDA,hhmmss.ss,dd,mm,yyyy,xx,yy*CC

hhmmss = HrMinSec(UTC)
dd,mm,yyy = Day,Month,Year
xx = local zone hours -13..13
yy = local zone minutes 0..59
*CC = checksum

The RMC sentence:

No need to go further - I see what the problem is.

Hmmmm....

Are you by any chance taking the data and displaying it on a PDA or
analog device?

Here's a link that may help you out.

http://www.gpsinformation.org/dale/nmea.htm#intro

Just puled up a host-search engine thing....

Um...huh?