As part of of the process of entering marathon swims such as the English Channel and long guided swims, swimmers are usually asked for official evidence of them completing long distance swims to prove their competence.
As established open water specialists Uswim Adventure offer the following;
Certificate signed off by Qualified Swim Coach on the day
Cost : 2 Hour Qualifier: Price varies
6 Hour Qualifier: Price varies
Note: Swimmers are responsible for providing own feeds . Kayak support may be required if outside of usual operating hours, however this can be arranged in advance.