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Two divers want to make two dives photographing a shipwreck at 101ft/31m using EAN30. They want 20 minutes bottom time on the first dive and need a two hour surface interval to change film and have lunch. Plan the dives using the Equivalent Air Depths table and the SSI Doppler No-Decompression Limits Air tables to determine the maximum adjusted no decompression limit for the second dive. ( Can you help me with this answer?)
I dont have the SSI Tables, but did it with the EANx and Air tables from PADI. I .assume that there shoudl not be too much of a difference in the result. I have worked it out as follows:
Nitrox 30 @ 31 metres, max bottom time is 20 minutes, PG N. PG after 2 hours SFI PG B. No decompression limit on the second dive is 14 minutes.
SSI Combined Air/ 
Linear Mode
