The name field must be composed of max 6 characters, choosen among uppercase letters, digits, space, plus, minus, or underscore. That is the name must match the following regular expression: [ 0-9A-Z_+-]{1,6}

The sym field describe the symbol displayed by the GPS for the waypoint. It must be one of the following string:

Flag, Residence, Car, Campground, Waypoint, Hunting Area, Geocache, Geocache Found, Boat Ramp, Fishing Area, Marina, Shipwreck, Swimming Area, Skiing Area, Trail Head, Skull and Crossbones, Medical Facility, Telephone, Restroom, Information, Park, Scenic Area, Picnic Area, Gas Station, Restaurant, Lodging, Bank, Golf Course, Building, Airport, Parachute Area.

Beware of the save track function of the GPS, which recompute the track to save space, but loosing some points.

Real example: we have captured three track segments; the GPS now contains three distinct tracks: ACTIVE LOG, ACTIVE LOG #2 and ACTIVE LOG #3, each containing a single track segment. Saving in a new track, all the segments are collapsed in single track segment contained in a single new track, saved with the given name. The number of points passed from (273 + 161 + 740) = 1174 to a total of 401 points, loosing in fact several details. Timestamp of track points are preserved, but the breaks between original track segments are lost; in place of the break, now you can just notice two points separed by a longer time interval.

Changing from MEDIUM to HIGH resolution on sampling tracks, it seems that only a 4% more points are saved: this is a sample riding the same route forward and backward:

Here it is the contacts pinout on the back of the ForeTrex:

http://www.ebottega.it/scheda.asp?sito=garmin&id=G10595&cat=13