The Navy’s last rigid-hull airship crashed off Point Sur in February, 1935 when a sudden gust of wind tore off her vertical fin. Gas escaped from the tear hole aft, and as she started to settle by the stern, ballast was jettisoned to compensate. Too much ballast, as it turns out - tail down but with engines at cruise power, the airship rose again, now passing through the pressure height - the height at which expanding helium gas must be vented, or the hull itself will catastrophically fail. Out of control and continuing to vent gas, she settled eventually back into the waiting sea. Only two crewmen were lost, from a contingent of 76 - one who jumped from the airship precipitously (height above water being notoriously hard to judge) and another who swam back to the sinking hulk in an attempt to salvage personal gear.

The USS Macon then:

And now, courtesy of Guy:

The debris field is being explored by the National Marine Sanctuary program and Monterey Bay Aquarium Research Institute. The cross bars you see in this sonar map are actually the wing spars of two F-9C Sparrowhawks that went down with Macon. On the linked page above is a close up of their remains, and here is a photograph of one of them “landing” aboard the mothership using its sky hook.