Help with Casio watch functions?

I found this casio watch of mine under my bed last night ans was wondering about 2 of the functions. The first says DT. I think it might be Daylight Savings Time but I'm not sure. The other is a separate part of the ST (Stopwatch) function. It says SPL. Any ideas people?

Doctor2011-03-01T01:00:40Z

Favorite Answer

DT stands for Dual Time, can show time of another time zone. ST for stopwatch. SPL for split time.

Visit the link to download a casio manual:
http://www.casionz.co.nz/Site/Pronto/Files/user_manuals/2672.PDF