"Sometimes we are lucky enough to know that our lives have been changed, to discard the old, embrace the new and run headlong down an immutable course. It happened to me on that summer’s day, when my eyes were opened by the sea."

Jacques-Yves Cousteau.


 ACE Marine Expeditions stands out as the only operator offering luxury diving on Koh Tao.

We offer a variety of fun diving options for the experienced or novice certified diver. Our expedition schedule changes daily to suit the needs of our customers. Divers have the choice of diving on our exclusive speedboat or our purpose built dive expedition boat. All of our dive trips are in small groups and include an experienced guide. Experienced certified divers may choose to discover the reefs of Koh Tao as a buddy pair. Camera rentals and imaging services are available for every expedition.

flexible schedules - small groups - 2 divers max per 1 staff - no dive cut-off times - camera rentals available - 2 dive boats to choose from - delicious food and drinks served on every trip

Diving with us is easy. Make your own dive schedule by choosing from our current selection of single dive, two dive, and 3 dive trips. If you don't see what you are looking for, then make a special request. You can also take advantage of our services online. Once on Koh Tao, we will meet you at your resort to plan your expeditions package. Our staff will help you pick and choose what dives and times suit your schedule best. To book your dives, contact us. 

Scuba Skills Update - Refresher

Has it been more than 6 months since your last dive? Make the most of your diving holiday by refreshing your diving skills before you begin your expeditions. Scuba reviews are for certified divers who have not dived for a while or for those who just want to brush up on their skills and have a more comfortable diving experience. One review is all it takes to get you back in the water. Each review is conducted by one of our dive professionals. Review your diver safety skills and be a safe diver. Protect the reefs by practicing your buoyancy skills before you dive. We conduct our reviews daily. Start your review early by brushing up online at home before your dive trip. Check out SSI's free online diving skills update before you get back in the water. Reviews may be conducted in our training pool, at your own resort (specific resorts apply) or private villa or on our Expedition Boat where we will take you to one of our beautiful bays around Koh Tao and conduct the review in the sea. Reviews may be conducted in a pool depending on weather or other conditions.

Duration: 3 hours - Price: 3000B

Check out our Day Trips