Updating satellite maps
When you first create a new waypoint the unit will automatically assign it a name.
These names are three digit numbers starting with 001 and incrementing each time you create a new waypoint.
It will automatically increment until it finds an empty number.
Some folks assign a waypoint to a high number to force a block of numbers to be sequential for a particular use.
A position marked in this way is designed as a safety feature for boat use when someone might actually fall overboard.
You may find other uses as well such as when your hat blows off you head driving down the road.
To do this just name a waypoint from the number sequence.
For example naming a waypoint to 001 explicitly will cause the next automatic number to be 002 unless this is in use.
Averaging still can reduce the some of the effect of a temporarily poor DOP.
This is accomplished by pressing the GOTO key (Nav key on the 76) twice in a row and then hitting enter.
This will store a special waypoint at your current location named MOB and will automatically start the navigation features of the unit to aid you in navigating back to that point.
The earliest units could save 250 waypoints while later models can store up to 500. In addition some units have additional waypoints that are stored in an internal database.
These database waypoints are discussed in the chapter on databases. On most unit they must be no more than 6 characters long and contain no spaces but can contain any combination of letters and numbers and some punctuation.If you want to save that location then you should rename it since it will be overridden by the next MOB sequence.