Crews rescued three mariners from a deserted island in the remote Pacific Ocean Thursday after a U.S. Navy aircrew spotted the word "help" written in palm fronds in the sand, according to the U.S. Coast Guard.

The three men, who were not identified, spent three days on the isolated island before their rescue.

The Coast Guard started searching for the men Tuesday morning after it got word from a Chuuk search and rescue liaison that a skiff had failed to arrive as expected on the island of Weno.

Coast Guard, U.S. Navy and Automated Mutual-Assistance Vessel Rescue System ships combed the skiff's last known location without success. On Thursday, a Navy P-8 Madfox 807 aircrew joined the search from Misawa Air Base in Japan.

The crew spotted the survivors holding life jackets and "their makeshift sign," the Coast Guard said.

A small local boat took the men to Pulap. Officials did not say what condition they were in.

The rescue was the seventh such case handled by the Coast Guard since March 28. Officials said 15 lives were saved in those operations.