How many bells are sounded at 0700?

The correct answer is based on naval tradition for the striking of the ship's bell, which is used to indicate the time throughout the day. The bell is rung at a rate established by the 4-hour watch periods, where each hour is indicated by a specific number of bell strikes. At the hour of 0700, seven bells are sounded. The calculation of bells follows that each hour of the watch is marked by a sequential number of strikes.

In total, for every complete hour that passes, the number of bells increases by one. Therefore, at 0700, since it is the seventh hour of the day, seven bells are struck. This is part of a broader historical context within the naval traditions where times of the day are marked for easier communication regarding the time and watch changes on board a ship.

To synthesize this information: at 0700, a total of seven bells are sounded to indicate the time, reflecting the naval practice of counting bells in such increments.