RMS Rhone

RMS Rhone Marine Park is a protected marine area in the British Virgin Islands centered on the wreck of the RMS Rhone, a British Royal Mail steamer that sank during a catastrophic hurricane on October 29, 1867, off the west coast of Salt Island. The marine park, established in 1980, extends from Salt Island to Dead Chest Island and encompasses both the protected wreck site and the surrounding coral reef and marine ecosystem. The RMS Rhone is widely regarded as one of the premier wreck dives in the Caribbean and among the top recreational shipwreck dives in the world, attracting divers from across the globe who come to explore the remarkably intact 310-foot iron-hulled vessel lying in two main sections at depths accessible to recreational divers. The park is administered by the National Parks Trust of the British Virgin Islands and plays a central role in the territory's scuba diving industry.

The wreck of the RMS Rhone has transformed in the century and a half since its sinking into an artificial reef of extraordinary ecological richness, colonized by an exceptional diversity of marine life drawn to the complex structure that the vessel provides. The iron hull, fittings, and machinery are encrusted with hard and soft corals, sponges, hydroids, and tunicates, creating habitat for a dense community of reef fish. Sergeant majors, blue tangs, French angelfish, yellowtail snappers, and Creole wrasse swarm around the wreck in large schools, while larger predators including barracuda, tarpon, and horse-eye jacks circle at mid-water. Spotted eagle rays and southern stingrays are regularly encountered gliding above the sandy bottom near the wreck sections. The bow section provides sheltered caverns and crevices that house green moray eels, lobsters, and cleaning station shrimp. Sea turtles, particularly hawksbill turtles, forage on the sponge communities encrusting the vessel structure and are among the most reliably encountered large animals at the site.

The marine flora of the RMS Rhone Marine Park encompasses both the biological communities encrusting the wreck itself and the natural reef and seagrass ecosystems of the surrounding protected area. Encrusting coralline algae provides the base matrix for coral settlement on the wreck's iron surfaces, while bushy soft corals including sea fans, sea rods, and sea plumes have colonized the hull in spectacular profusion, their delicate branches swaying in the current. Hard coral colonies including brain corals, star corals, and pillar corals have established themselves on the more stable sections of the wreck structure. Natural coral reefs extending from Salt Island and the adjacent underwater topography support diverse reef communities interspersed with sand patches and rubble zones. Shallow seagrass beds of turtlegrass in the calmer, sheltered areas of the park provide foraging habitat for sea turtles and feeding grounds for reef fish that shelter in the wreck during the day.

Salt Island, from whose coast the RMS Rhone wreck lies, is a small island of volcanic origin in the Sir Francis Drake Channel of the British Virgin Islands. The island is composed of the same andesitic and volcanic basement rock that underlies the broader Virgin Islands chain, formed by the tectonic processes of the Lesser Antilles island arc. The seafloor around Salt Island consists of a combination of rocky reef substrate transitioning to sandy and silty sediment at greater depths. The wreck itself rests on a sloping bottom with the bow section at approximately 25 meters and the stern at 8 to 15 meters depth. The Sir Francis Drake Channel, separating Tortola from the Sir Francis Drake island chain including Salt Island and Peter Island, is a relatively sheltered waterway that provides calmer diving conditions than the outer Atlantic-facing shores of the British Virgin Islands. The rocky underwater topography near Dead Chest Island at the park's western boundary includes dramatic walls and pinnacles that complement the wreck diving experience.

The RMS Rhone Marine Park experiences the classic Caribbean climate of the British Virgin Islands, with warm, sunny weather throughout the year tempered by the northeast trade winds that provide the islands with their characteristic pleasant breezes. Air temperatures range from approximately 23 to 26 degrees Celsius in winter to 27 to 32 degrees Celsius in summer. Water temperatures at dive depth hover between 26 and 29 degrees Celsius year-round, eliminating the need for thick wetsuits and contributing to the comfort of recreational diving. The Atlantic hurricane season from June through November poses the primary weather risk, with the British Virgin Islands lying squarely within the hurricane track corridor. The devastating passage of Hurricane Irma in September 2017 caused significant damage to coral reefs throughout the BVI marine parks. Visibility at the RMS Rhone dive site is typically excellent, ranging from 20 to 40 meters, with the clearest conditions generally occurring from December through May when trade winds are strongest and the water column is least disturbed by summer rainfall and runoff.

The sinking of the RMS Rhone is one of the most tragic maritime disasters in the history of the Caribbean, claiming approximately 123 lives with only 23 survivors from a passenger and crew complement of around 146 people. The Rhone was a state-of-the-art iron-hulled steam-powered mail ship owned by the Royal Mail Steam Packet Company, launched in 1865 and considered one of the finest and most reliable vessels of her era. On the fateful day of October 29, 1867, the Rhone was sheltering from the first phase of a hurricane at Great Harbour, Peter Island, when the storm appeared to temporarily abate — a false calm indicating the passage of the hurricane's eye. When the second, more violent phase of the storm struck suddenly from the opposite direction as the ship attempted to head for open sea, the Rhone was driven onto the rocks at Salt Island and broke apart, killing nearly all aboard. The disaster profoundly affected the small community of Salt Island, whose residents had maintained a traditional salt-harvesting lease in exchange for paying the British Crown a single bag of salt per year, a tradition maintained for over a century after the sinking.

The RMS Rhone Marine Park was established in 1980, making it one of the earliest marine protected areas in the British Virgin Islands and among the first wreck-centered marine parks in the Caribbean. The designation came in response to growing interest from recreational divers in the Rhone wreck, which had been recognized since the 1960s as an exceptional dive destination and had gained international fame after being featured in the 1977 film The Deep, which was partly filmed at the wreck site. The marine park status provided legal protection for the wreck against salvage and artifact removal, while also protecting the coral reef ecosystems of the surrounding Salt Island area. The National Parks Trust of the British Virgin Islands manages the park, which requires dive operators and visiting vessels to use mooring buoys rather than dropping anchor near the wreck. The park generates significant revenue for the territory through dive tourism and plays a central role in positioning the BVI as a world-class scuba diving destination.

The wreck of the RMS Rhone is divided into two main dive sections that are typically treated as separate dives. The bow section lies at depths of approximately 25 to 30 meters in deeper water and offers the most dramatic underwater scenery, with the massive iron hull, intact bowsprit, and the ship's propeller and engine machinery forming an awe-inspiring artificial landscape completely encrusted with coral and marine life. The stern section lies in shallower water at 8 to 15 meters and is accessible to snorkelers as well as divers, with the iconic lucky porthole — a brass porthole that survived the sinking intact and remains shiny from generations of divers rubbing it for good luck — being one of the most photographed features of the wreck. Night diving on the Rhone is a transformative experience, with bioluminescent organisms, sleeping fish, hunting octopuses, and the ghostly illumination of the wreck structure under torch light. The surrounding natural reef at Dead Chest Island and the shallow snorkeling reef near Salt Island provide complementary experiences to the main wreck dives.

The RMS Rhone Marine Park is accessed by boat from various points in the British Virgin Islands, with the wreck lying off the west coast of Salt Island in the Sir Francis Drake Channel. The nearest major hub is Road Town on Tortola, approximately 10 nautical miles to the northwest, with charter sailboats, dive boats, and day-trip vessels making regular visits to the site. Dozens of BVI-based dive operators offer day trips and multi-day liveaboard expeditions to the Rhone, with most offering two-tank dive packages that include both the bow and stern sections. The National Parks Trust requires all visiting vessels to use designated mooring buoys at the site to prevent anchor damage to the wreck and surrounding reef. A park entrance fee is charged per dive. Salt Island itself is a tiny, barely inhabited island with no tourist facilities, and overnight accommodation in the BVI is based on Tortola, Virgin Gorda, or aboard charter yachts. The BVI is easily accessible by air via Terrance B. Lettsome International Airport on Beef Island or by ferry from St. Thomas in the US Virgin Islands.

The protection of the RMS Rhone wreck as a marine park has been essential to preserving both the historical integrity of the vessel and the rich marine ecosystem that has developed around it. Without protection, the iron hull, fittings, and artifacts would have been significantly stripped by souvenir divers and commercial salvagers, as has occurred at many other historic Caribbean wrecks. The park rules prohibit the removal of any artifacts, anchor dropping near the wreck, feeding of marine life, and any contact with the coral-encrusted wreck surface. Hurricane Irma in 2017 caused some physical dislocation of wreck sections and significant damage to surrounding coral reefs throughout the British Virgin Islands marine parks, prompting reef restoration efforts. Long-term conservation challenges include the gradual deterioration of the iron hull through corrosion and biological breakdown after over 150 years underwater, invasive lionfish management on the wreck and surrounding reef, and the impacts of warming Caribbean waters on coral reef health. The dive tourism economy associated with the Rhone creates strong local economic incentives for the continued protection and sustainable management of the marine park.