Here's something a bit different, some scuba-themed pinball machines. Being a Pinball Wizard could be handy for a diver; those "crazy flipper fingers" might prove very useful...
This 1970 machine from Gottlieb paints a rather unrealistic view of diving. A wreck, a shark, treasure and a mermaid all in one dive?! That hardly ever happens.
This 1971 Bally table paints a more futuristic view of diving but I'm not sure how easy it would be to equalise with a glass bowl on your head.
The other machines allow for one or two players but this Stern table from 1977 can have four players. Remember though, always play pinball with a buddy!