From Crabs present base, (Chivenor UK) but in the mid '80's, we did an 8 minute, (telephone call to landing back at base with the casualty) wet rescue; an exhausted swimmer out of the River Taw.
It was in a Wessex however, not a Seaking!
These days (UK HEMS) we lift in about 2-3 minutes from the call, but no one is counting.