Help with dive tables

[teachervt]

Hello
I'm not actually a diver. I am a geocacher and I need the help of scuba divers to solve a puzzle and find a hidden cache. I've been trying to use dive tables to solve the following problems. Any help would be appreciated.

You dive 120 feet for 12 minutes. you have a surface interval of 4 hours 57 minutes what is your adjusted maximum dive time for a dive to 110 feet?

You dive to 60 feet for 40 minutes. You have a surface interval of 30 minutes. Your next dive is to 40 feet what is your residual nitrogen time?

I think I figured out two of the other clues but I'm stumped on these. Too hard for a land lubber. Although scuba diving would be an awesome hobby. Thanks

 

[iztok]

I am both scuba diver and geocacher.

PM me the link to the cache and I'll get you a solution.

Is it calling for PADI tables? I am at work now but I have them in my hotel room.

 

[iztok]

120ft 12 minutes - J diver
4:59 min SI - A diver

110ft - 3 RNT 13 ABT = 16 TBT

-----------------

60ft 40min - Q diver
SI 30 min - K diver
40ft - RNT = 48min


Using PADI tables here.

 

[WetDawg]

Diver and cacher here in South Florida... where are you located?

 

[teachervt]

This is the link to the puzzle I must solve. Thanks for your help
geocaching.com/seek/cache_details.aspx?guid=bb687dc4-4abd-4fdc-9454-16378be5aef1]GCQ4WC Ice Caves (Unknown Cache) in Vermont, United States created by scubatime[/url]

 

[teachervt]

geocaching.com/seek/cache_details.aspx?guid=bb687dc4-4abd-4fdc-9454-16378be5aef1

 

[rhwestfall]

great, but you better not show him the secret handshake.......

 

[teachervt]

Vermont

 

[iztok]

The info above I calculated should get you the answer. Good luck!

 

[rlskill1]

I agree