The Zanzibar Dive Centre, One Ocean is the oldest and most reputable dive operation in Tanzania.
Since 1993, thousands of tourists have been delighted by the snorkelling, scuba diving and scuba diving courses provided by our outstanding team.
In 1999 Gary Greig, an Australian, bought the company and since then it has expanded its operations on Zanzibar to include some of the best resorts and beach lodges on the island.
As a 5 star padi dive centre One Ocean follows all PADI Standards
All One Ocean boats are equipped with mobile phones, life jackets, snorkel vests, safety rings, first aid kits, emergency oxygen units and two engines.
Dives are always led by PADI certified Divemasters or PADI certified Instructors, while our snorkellers are accompanied in the water with at least one of our highly trained and experienced snorkel guides.
We work with an emergency action plan for all our centres and all One Ocean staff are trained in Emergency First Response CPR, First Aid and as Oxygen providers with refresher training being held every 6 months to keep them up to date with any changes to official procedures and techniques.
Being a DAN Safety Partner means that in a diving medical emergency, all our staff are 100% ready and fully equipped to handle the situation.
We highly recommend that you have diving insurance – if you do not have specific dive insurance, please check
DAN’s temporary memberships that could cover your activity during your holidays.
As a further commitment to diving safety, several of our staff members have been trained as hyperbaric chamber operators and assistants to help with any diving incidents that occur in Zanzibar.
Our extensive selection of equipment consists of
|FINS-FuLL foot||ScubaPro Go|
|WETSUITS||Reef 5mm long or short|
|MASKS||ScubaPro and Reef|
|10 L Tanks||Aluminium Tanks|
|12 L Tanks||Aluminium Tanks|
|VALVES||DIN and Yoke|
Here at One Ocean we regularly engage with Zanzibar's charities and NGOs and help with fundraising for their projects. For example, we run regular charity dive days where any profits are donated to Zanzibar's projects to help with community support.
We are currently involved in working with a local institute, Prospective Learning and Charitable Institute (PLCI), to select and train a graduate of this programme up to PADI Divemaster level, to enable them to gain valuable skills and employment within the tourism sector.
We also strive to directly support Zanzibar's industry by using locally made hand-made boats, called dhows, for our operations whenever possible.
We pride ourselves on being a responsible and environmentally friendly dive operation. We are now extremely proud to announce our partnership with Carbon Tanzania with aim of offsetting both our own and our customers’ carbon footprint. One Ocean will be contributing to this great cause and we will ask our customers to donate a minimum of $1 to help offset their emissions. The need to take action against climate change has never been more urgent and we as a dive centre believe in playing our part.
For more information on the great work being done visit our partner Carbon Tanzania.
Meet the Team
Gary's Right Hand Man
Boat Builder & Captain
Assistant PADI Instructor
Those who stay dry
Office Manager Matemwe
Office Manager Stone Town
Office Manager Ocean Paradise
Office Manager Bluebay
Scubapro Gear Technician
Those who get wet
Dive Master & Musician
Instructor & Mechanic
Dive Master, Driver & Office Assistant
Our entire crew is well trained, licensed and experienced with the surrounding ocean and reefs.
All scuba dive staff are are members of the Professional Association of Diving Instructors (PADI).