Dive Site: Proselyte Reef

About Proselyte Reef

Proselyte Reef, located off the south coast of Sint Maarten near Philipsburg, is the island's most renowned dive site. It is named after HMS Proselyte, a Royal Navy frigate that sank here on September 4, 1801, after striking an uncharted coral head. Over two centuries, the wooden hull has disintegrated, leaving behind a scattered constellation of iron artifacts, including cannons, anchors, and ballast stones, which are now heavily encrusted with coral and integrated into the natural reef. The dive site is largely shallow, with a maximum depth typically around 18 meters (60 feet), making it accessible to divers of all experience levels. The topography features a sandy seabed interspersed with coral formations and the shipwreck debris. The wreck elements are spread across a wide area, avoiding the need for penetration. Proselyte Reef is a vibrant ecosystem supporting a diverse array of marine life year-round. Divers frequently encounter southern stingrays, green moray eels, barracudas, and nurse sharks. The site's combination of natural reef and artificial structure provides exceptional habitat, attracting various reef fish and crustaceans. Diving here offers a blend of historical exploration and marine observation. The visibility is often excellent, allowing clear views of the extensively coral-covered wreck and the surrounding reef. Boat trips from Philipsburg or Simpson Bay typically reach the site within fifteen minutes.

Dive site facts: Proselyte Reef

Depth

6–18 m

Typical dive

15–18 m, 47–60 min

Current

Mild

Visibility

12–30 m

Water temperature

25–28°C

Entry

Boat

Level

All levels

Dive type

Wreck, reef, history

Night dive

Possible

Region / port

Philipsburg, St. Maarten

Coordinates

18.0000° N, 63.0500° W

Conditions & Currents

Proselyte Reef typically features minimal to gentle currents, making it suitable for divers of various experience levels. The calm conditions are particularly common when the Caribbean Sea is at its most benign, such as during the dry season. Entry and exit are generally straightforward from a dive boat, with the mooring often set in 14 meters of water. Visibility at the site is frequently exceptional, ranging from 12 to 30 meters (40 to 100 feet), though occasional swings can occur. Divers should still be mindful of their air consumption and plan their dive profile accordingly, as even mild currents over an extended dive can affect gas reserves.

Marine life & sighting chances

Southern stingray

common

Green moray eel

common

Lobster

common

Barracuda

common

Nurse shark

occasional

Sergeant major

common

French angelfish

common

Trumpetfish

common

Green sea turtle

occasional

Hawksbill sea turtle

occasional

Triggerfish

common

Conch

common

Dive profile & how the dive runs

Your dive at Proselyte Reef typically begins with a descent down the mooring line to around 14 meters, where the reef and wreck debris become immediately visible due to exceptional clarity. The route often starts exploring the eastern section of the reef, where you can identify several cannons, their forms softened by coral and sponge growth. You'll then navigate across the sandy patches and coral formations, observing ballast bars and anchors scattered among the marine life. The maximum depth reached is around 18 meters, allowing ample bottom time for exploration. The dive progresses along the reef and wreck remnants, ensuring you experience the unique blend of history and biology. A small wall or canyon drop-off nearby provides additional hiding spots for marine species. The safety stop is usually conducted at 5 meters near the ascent line, offering a final opportunity to observe shallower reef life before surfacing.

Underwater photography

Proselyte Reef offers excellent opportunities for both wide-angle and macro photography due to its clear waters and diverse subjects. For wide-angle shots, a fisheye or wide-angle rectilinear lens is ideal to capture the expansive wreck site with its scattered cannons and anchors, especially when encrusted with vibrant corals. External strobes are recommended to bring out the true colors of the reef and wreck. For macro subjects, such as the numerous lobsters sheltering under debris or small critters hidden within the coral-covered artifacts, a macro lens with a focus light will be highly rewarding. Maintain excellent buoyancy control to avoid disturbing the sensitive coral growth on the wreck and to get steady shots. Be mindful of marine life, particularly moray eels residing in cannon bores, and approach with respect.

Combine with nearby dive sites

• Carib Cargo

  A penetrable wreck popular for training and underwater photography.

• Fish Bowl

  A circular reef with a spectacular swim-through and abundant fish life within Man O’War Shoal Marine Park.

• Fuh Sheng

  A deep artificial reef suitable for advanced divers, hosting schooling fish and rays.

• The Bridge

  A site near Simpson Bay lagoon with yacht wrecks and remains of an old bridge.

• Gregory

  An upside-down transport barge wreck with slipper lobsters and turtles nearby.

• Mike's Maze

  A shallow site in Man O’War Shoal Marine Protected Area with healthy coral and maze-like swim-throughs.

Getting there & logistics

Diving Proselyte Reef typically involves day trips from Philipsburg or Simpson Bay, with boat journeys to the site taking approximately fifteen minutes. St. Maarten is served by Princess Juliana International Airport (SXM). Most dive operators are resort-based, offering various packages. Trips often combine Proselyte Reef with other nearby sites for multi-dive excursions. While there are no specific permit fees for this site mentioned, the island's Man O'War Shoal Marine Park may involve fees for broader diving activities. Dive operators will handle most logistics, including equipment rentals and certified guides. Divers should confirm their certification status and bring their dive cards.

Safety & environment

For dive safety in St. Maarten, Divers Alert Network (DAN) insurance is highly recommended to cover unforeseen circumstances, including potential recompression chamber treatments. The nearest recompression chamber is approximately 10 kilometers away. Evacuation to the chamber would be by local emergency services, emphasizing the importance of proper insurance and following dive protocols. Site-specific hazards at Proselyte Reef are minimal due to its shallow depth and calm conditions, but divers should maintain proper buoyancy to avoid contact with the fragile coral growth on the wreck and reef. Always dive within your training and comfort limits, and never dive if feeling unwell or congested. A 24-hour surface interval is advised before flying after diving.

Who it suits — and who it doesn't

FAQ

Proselyte Reef FAQ

Liveaboards diving Proselyte Reef

These liveaboards may visit Proselyte Reef on selected itineraries — the exact dive sites depend on departure, weather and conditions.

Caribbean Explorer II

St. Maarten

18 guests

$249/day