HONOLULU - The commanding general of the 1st Marine Aircraft Wing says he understands first-hand the "emotional roller coaster" families of 12 Marines missing off Hawaii are feeling.

Brig. Gen. Russell Sanborn told reporters Sunday that his wife went through similar emotions when he was shot down 25 years ago during Operation Desert Storm and was listed as missing in action.

Two helicopters each carrying six Marines went down off Oahu's north shore late Thursday.

Rescuers from various agencies have been searching round-the-clock.

The Coast Guard says there's no intention to call off or suspend the search on Sunday. Coast Guard Capt. James Jenkins says families will be notified in advance when officials plan to end the search.

A high surfing warning extended to Sunday was downgraded later in the afternoon to an advisory.