"Probably because GPS was originally aimed as sea and air navigation, I believe both traditionally use knots." This is MORE a function of NMEA output - I have a JRC OEM GPS receiver that natively puts out Meter per second in the JRC proprietary JRC format ... RF Jim ----- Original Message ----- From: "Mike Harrison" To: Sent: Thursday, November 21, 2002 9:26 AM Subject: Re: [OT]: While on the subject of GPS... On Thu, 21 Nov 2002 12:06:26 -0200, you wrote: >Hi, > > >> > OK, so I was asked to put together a GPS speedometer. I thought it would >> >> IIRC one of the NMEA0183 messages gives speed, possibly in knots, but I >> thought it was MPH. > > > It is surely in knots in the $GPRMC message. I am not sure why but it >does seem to get crazy less often than the position information. > >Best regards, >Alexandre Guimaraes Probably because GPS was originally aimed as sea and air navigation, I believe both traditionally use knots. -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body