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Colombo Tec Adventure
NESW
◆ The Wreck Chart · Off Colombo

ColomboTecAdventure

Five wrecks · 40–57 metres · One extraordinary day of diving · A technical diver's dream come true.

Length
Day
Vessel
Boat
Departure
Colombo
Return
Colombo
Dives
1 to 2 Tec dives
Technical Wreck Portfolio · Westcoast

Go Tec in Colombo

Within 10 nautical miles of Port City Colombo lies one of Sri Lanka's richest concentrations of deep-water shipwrecks. Choose one or two technical dives per day and explore five exceptional wrecks ranging from 40 to 57 metres in depth—each with its own history, mystery, character and underwater story. Designed for appropriately qualified technical divers, from those developing their deeper-wreck experience to seasoned technical explorers, the Colombo Tec Adventure offers the rare opportunity to combine serious wreck exploration with the comfort and convenience of a private diving experience just offshore from Sri Lanka's commercial capital.

Trace the route — tap any marker to open its log.

ColomboMount Lavinia
N

Off Colombo

Wreck Chart · Chart N°03

5 nautical miles

Port and dive-site positions are approximate — not for navigation. Coastline © OpenStreetMap contributors.

SS Worcestershire
N°01Technical · 57 mWreck

SS Worcestershire

Our flagship on the westcoast the British armed liner SS Worcestershire, was sunk by the merchant raider SMS Wolf is a technical decompression dive at 57 m. All that remains is a hull resembling a giant canoe, most of the structure deteriorated and collapsed but the marine life is breathtaking.

The bow, the amidships with its large quadruple steam engine, and the stern are the highlights, with several penetrable sections for those within their certification limits.

Photography: Dharshana Jayawardena

Battery Barge
N°02Technical · 45 mWreck

Battery Barge

An unidentified barge, resting at 45 metres, its solitary boiler standing as a silent reminder of its unknown past. Today, the wreck has become a hidden oasis beneath the blue, alive with colourful corals and thriving fish life. A small wreck with an extraordinary underwater presence, it offers technical divers a glimpse into one of Colombo’s lesser-known underwater worlds.

Photography: Dharshana Jayawardena

SS Perseus
N°03Advanced + Deep Spec · Technical · 40 mWreck

SS Perseus

Sunk by the German raider SMS Wolf just four days after the loss of SS Worcestershire, the SS Perseus rests on pristine sand at 40 metres. Remarkably intact and surrounded by shoals of fish, this impressive wreck offers exceptional underwater visibility, often exceeding 30 metres.

At the northern stern, a large steering quadrant and a swim-through reveal striking details of the ship's structure. Two enormous masts lie on the seabed, while two boilers remain amidships. To the south, the fractured bow offers access to two lower decks, adding another dimension to this fascinating wreck exploration.

Look out for blue-striped snapper, Napoleon wrasse, stingrays and barracuda, with the occasional mobula ray gliding past in the blue.

Photography: Dharshana Jayawardena

Wallet Wreck
N°04Advanced + Deep Spec · Technical · 40 mWreck

Wallet Wreck

Lying close to the SS Perseus at a depth of 40 metres, this small, unidentified wreck has an unusual shape reminiscent of an open wallet. Draped in colourful soft corals and surrounded by thriving marine life, it remains remarkably pristine. Small enough to explore in a single dive, it holds on to one final mystery: we have yet to determine which end is the bow and which is the stern.

Photography: Dharshana Jayawardena

Black Coral Wreck
N°05Advanced + Deep Spec · Technical · 40 mWreck

Black Coral Wreck

An unidentified vessel resting upright on pristine sand at a depth of 40 metres, this mysterious wreck remains silent about its origins and final voyage. Its defining feature is a solitary boiler adorned with beautiful black coral, creating a striking focal point against the wreck's weathered structure.

Schools of sea snakes are known to inhabit the site, adding to its unique character. With its unknown past and distinctive marine life, the Black Coral Wreck offers a compelling glimpse into another of Sri Lanka's lesser-known underwater discoveries.

Photography: Dharshana Jayawardena

The Voyage Plan

Five days on the water

A week working the deep wrecks off Colombo — ten dives, all within reach of port Colombo.

A Typical Day of Wreck Diving

  • 07:30 — Meet and prepare
  • Meet the crew, complete the necessary checks and briefing, and travel by boat to the selected wreck.
  • First dive — Explore the wreck
  • Descend with your guide to explore the selected site, subject to certification, experience and conditions.
  • Surface interval — Rest and prepare
  • Take a break between dives, review the next site and prepare for the following dive.
  • Second dive — Another perspective
  • Where conditions and the itinerary allow, explore another wreck or revisit a site with a different plan.
Notes to Mariners

Your Journey Begins Before You Fly

  • 01Maximum depth for recreational dives is limited to 30 m.
  • 02Night, deep and decompression dives beyond 18 m are for suitably certified divers only.
  • 03Diving with a computer is mandatory; solo diving is not permitted.
  • 04Wait 24 hours before flying after your last dive.
  • 05Exact route and sites are subject to local regulations, guest experience, weather and logistics — at the Captain's discretion.

Experience required

  • Advanced Open Water + Deep Speciality — 50 minimum logged dives, of which 7 minimum logged dives to 40 m required.
  • Tec 50 certification / Extended range.
Colombo Tec Adventure route map
All maps are for illustrative purposes only.
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