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Thanks again for the response, Gord.
I had forgotten about all the boat and sailing terminology you had used on Island and was thinking more of the flora and fauna of the location. That’s why I was thinking that perhaps there wasn’t as much research as with Dive and Everest. My mistake!
I don’t think it shows that you winged it in Dive at all (but then I’m no diver). You cover the different tanks and gases needed to dive to certain depths, the decompression involved, different hand signals used to communicate, and many sensory sensations relating to various aspects of diving. For me, it did not lack at all in verisimilitude.
Iggy Ocasek was a scientist working for Poseidon that was in the underwater habitat when the kids first go down there. A bit of a scatterbrain inventor, he also rigged up a vehicle to look deeper in the water for the wreck. I was just curious if the character name was a mash-up of the two musicians I mentioned or completely unrelated.