FOR the third weekend in a row, boating conditions off the Sunshine Coast will be less than ideal for diving.

A sub-tropical low-pressure system has been moving slowing off the coast for the past few days, whipping up big seas.

This, however, won't cause too much hardship for a small group of lucky local divers who are packing their bags for their flight to Vanuatu in the South Pacific early next week.

The group is heading to Espiritu Santo, the largest island in the country, and arguably the most beautiful of all the islands in Vanuatu.

It takes just under three hours to fly direct from Brisbane to Espiritu Santo.

The group is made up of keen wreck divers eager to explore one of the most famous shipwrecks in the world, the SS President Coolidge.

The Coolidge was transporting thousands of soldiers when it struck a mine during World War II.

She is a huge ship which measures almost 200m in length.

The divers will be able to penetrate its dark compartments under the supervision of an experienced local guide.

Although the stern of the Coolidge lies in 60m of warm, clear water, most divers will limit their depth to 40m.