The US Divers team does not have a snorkel division. The question is not relevant to the diving team as they normally are diving from large heights and then resurfacing they do not have a need for snorkeling while diving in competition or during practice at their facilities in the USA.
USA Diving does not sponsor snorkel divers. Its most recent national championships in August included springboard diving (both 1-meter and 3-meter versions), platform diving and synchronized versions of those events.
There is no snorkel division for the United States diving team. This is most likely because they only enter the water from a distance and don't spend time in it.
