For standard marathon swims such as the English Channel, Santa Barbara Channel, or Catalina Channel, swimmers need not concern themselves with “proving” they did the swim. For these swims, the authenticity of a swimmer’s claim is supported by the legitimacy of the local sanctioning organization — legitimacy derived from the marathon swimming community’s trust in the organization’s leaders and procedures.
A legitimate local sanctioning organization provides trained observers to document swims and verify adherence to the organization’s published swim rules. Although it’s difficult to “prove” an event witnessed by few, many miles out to sea, any swim ratified by trusted organizations such as the CS&PF, SBCSA, or CCSF is generally accepted without question by the marathon swimming community. A swim log completed by the official observer is viewed as the only “proof” needed (though ironically, these logs are almost never made public, and in some cases are held quite tightly by the organization).
But what about swims for which there is no well-established sanctioning organization? How do you make a swim “count” in ungoverned waters, without a trusted sanctioning organization to back up your claims?…