once a year
once a year
every 3 years
Three years
It is every year.
Renewal is not necessary for your Indiana boater education card.
3 years
3 years
Three years
Once a year
Three years
Once Every Three Years
A number of boats floating down a river, but not referred to as a fleet, can be called a "flotilla." A flotilla typically describes a group of small boats or ships that are traveling together, often for a specific purpose or occasion. If the context is informal, you might simply refer to it as a "group of boats."