So I was reading somewhere about the Tri-tops and certain races requiring them and decided to look up the USAT rules and regs.
Didn't find anything concerning this issue. But did find this tidbit:
4.7 Official Equipment. If provided by race management, a swimmer shall wear the proper official swim cap
corresponding to his wave. The penalty for an infraction of this rule is a variable time penalty. For safety reasons if
no official cap is provided, all swimmers should wear their own brightly colored swim cap.
4.8 Goggles. Swimmers may wear, but shall not be required to wear, swim goggles or face masks.
4.9 Illegal Equipment. Any swimmer wearing any artificial propulsion device, including but not limited to fins,
gloves, paddles, or floating devices of any kind shall be disqualified.
So that means that I could in theory wear a snorkel mask and snorkel during the swim. Now granted that would be a little funny and possibly not increase my speed but it would be possible based on these rules. The reason that I thought about this is an old man that I see at the pool who has a very methodical stroke while using his mask and snorkel. Interesting thought.