If PSA served Half Moon Bay (HAF) it would need to have been a smaller piston or turboprop, since the runway, which is now 5,000', was formerly 3,500'. It's a small strip on the coast side of San Mateo County. There is a famous story about the first flight of Air California (not PSA), an Electra, diverted to HAF when SFO and Oakland were below minimums, but I did not know it had actual service. Lake Tahoe (TVL) service was Electras, and briefly 727s. I took the Electra service from SFO to TVL a number of times. It's an exciting approach - it's a left hand pattern, you come in on a downwind leg over the lake, really close to a ridge, then make a really sharp left- hand turn, not much of a base leg, then another sharp left turn, and land. TVL is in a relatively narrow valley between mountains. 727s could not execute that approach, and were restricted to straight-in approaches over the lake, and departures over the lake. I think 727s were eventually banned due to noise issues, and were uneconomical in any case. I miss the Electra flights, though. Air California operated them to TVL as well. -- Michael C. Berch mcb@xxxxxxxxxxxxxx