Correcting a bit of misinformation from the comments section of a recent post…
Tandem swimming is allowed on Catalina swims, so long as each member of the tandem is sanctioned by CCSF. This is from a CCSF official:
The CCSF recognizes a difference between a SANCTIONED swimmer and a COMPANION swimmer. Sanctioned tandem swims are allowed.
What’s at issue is the COMPANION swimmer, who typically knows the swimmer but has no relationship with the CCSF (eg application, swim history, insurance). For safety purposes, the CCSF wishes to limit that swimmer’s time in the water to a maximum of 3 hours in shifts no longer than 60-minutes. That’s more in accordance with English Channel standards. Different than Dover, a CCSF swimmer could– if they so desired– recruit 5 companion swimmers. Technically, they could rotate 1-hour legs for a 15-hour crossing (5x 3-hours). I have also pondered having a tandem event from the same boat: One solo swimmer going side-by-side with a 6-person relay. Though, it would take some serious synchronized swimming to make that feasible….