There's no command in the game to return the ASLW position unless you use getPosASLW, which obviously requires an object. Sometimes there's no object involved and we simply want to convert a position to ASLW format.

Requested commands:
AGLtoASLW
ASLtoASLW
ATLtoASLW

(maybe the inverses too?)

P.S: The ASLW height is the only reliable (and the fastest) method for detecting whether a position is below water or not. See this topic:
https://forums.bohemia.net/forums/topic/225310-finding-the-water-depth/?do=findComment&comment=3376394