TLAM

[Polak2]

And while talking about manuals.... Here is the instruction how to program waypoints in TLAM launch in RA 1.41.

Advanced Control: For launch it is necessary to nominate number of a point in which there is a target (It sets in what point to switch on a sensor on missile).
For example player has established a point number 2 on the target - then it is necessary to specify in “Destruct Range” number of a point - 2.
The launch from Nav.map - is launch with one point - this mode number 1 (ONE) is established
as default.
There is a mode number 5 - missile enables a sensor in each waypoint. If the target is found out - missile kills it. If the target no - then the missile switch off own sensor and run to the next way point and there makes search (For All Four Waypoints Subsequences).

Part of launching it from nav map is clear and is working fine. However, the mission requires added landfall to be successful (so at least 2 waypoints needed). "Destruct range" is 4 digits value and its units are in nautical miles.

Just set it to 2 "miles" anyways, and the UGM-109 will detonate at the second waypoint.
Hope I got you right?
Not 100% sure what you're asking.

[Polak2]

It was little vague, but by few trials i figured out that to accomplish TLAM strike with 1 launch point and 3 waypoints and 1 target point (mode 5) magic number "4" needs to be entered into DR field.
So it is not a range per say, but rather sequential number/label of the waypoint, over which, we want missile to go off.