B&G Deckman - Manual (Page 29)

Chapter 3: Navigation
3.2
The numeric keypad
Whenever Deckman expects you to enter a numeric value a keypad will
appear like the example in Figure 3.2. The number you enter is shown at
the top in larger size; a message is shown below which usually gives the
current value.
The keys down the right have the following functions:
Escape: this exits without making any changes
Backspace: deletes the last digit entered
Minus: makes any value entered negative. For
inputting West longitudes or South latitudes as
these are both considered negative on Deckman.
Enter or Return: tells Deckman to accept the
value entered
Figure 3.2