Final answer:
Sharing a dive computer with a dive buddy is not okay because it could lead to decompression sickness since the computer cannot track individual dive profiles for more than one diver.
Step-by-step explanation:
The statement 'It is OK to share a computer with your dive buddy' is false. Each diver should have their own dive computer. A dive computer is a personal safety device that monitors your depth, time underwater, and no-decompression limits. Sharing a dive computer could lead to confusion and increases the risk of decompression sickness, as it cannot accurately track the individual dive profiles and ascent rates for more than one diver. Dive planning and adherence to individual dive profiles are critical for diver safety.