Sorry if this is a stupid question, but in terms of planning dives using the Mosquito....
Lets say I do a dive to 50 ft. for 30 minutes. I'm on the surface and the computer is calculating my surface interval. I want to go back and do the same dive again (or say a different one...it doesn't matter). How do I tell how long I need to stay on the surface? Does the computer just keep the time I've been on the surface for me and I still have to go back to the tables to figure out the appropriate SI? Or, is there where the "plan" mode comes in? If in-between dives I set my next dive "plan", does it give me a count down to when I can start my next dive?
Again, I haven't dove with computers before, so I'm just learning about how to use them properly.