From Glory to Abyss: Unraveling Legacy of the SS President Coolidge
Peter Letts May 17, 2023
Espiritu Santo wreck-diving guide
Dive the SS President Coolidge in Vanuatu
Explore the history, depths, signature routes and safety considerations of one of the world’s greatest accessible shipwrecks.
The short answer
Why is the SS President Coolidge so famous?
The SS President Coolidge combines extraordinary scale, unusually convenient access and two distinct histories in one wreck. She began as an American luxury liner, became a troop transport during the Second World War and sank off Espiritu Santo on 26 October 1942 after striking two American defensive mines. Today the approximately 200-metre ship rests on her port side, with the bow near 21 metres and the stern around 70–73 metres.
That depth range allows suitably guided recreational divers to see the shallower exterior and forward sections, while advanced, deep, wreck and technical divers can progressively visit cargo holds, military equipment, former passenger spaces, the engine room and deeper stern. The Coolidge is not one dive—it is a complete wreck-diving destination that rewards several days of careful progression.
1931–1941
From trans-Pacific luxury liner to troopship
Newport News Shipbuilding and Dry Dock Company built the President Coolidge for Dollar Steamship Lines. Launched on 21 February 1931, she and sister ship President Hoover were among the largest American-built merchant ships of their time. The Coolidge later operated for American President Lines on trans-Pacific routes.
The passenger ship had elegant dining and public rooms, a swimming pool and decorative fittings that contrasted sharply with what came next. She was not related to Titanic and did not share Titanic’s design lineage; the comparison sometimes made in older articles is simply a way of conveying scale and luxury, not a genuine heritage connection.
As war spread across the Pacific, the ship was employed as a troop transport. Passenger spaces were adapted for thousands of soldiers, while military vehicles, weapons, medical supplies and other cargo filled her holds. Traces of both identities remain underwater, which is what makes the wreck much more than a steel hull.
26 October 1942
How the SS President Coolidge sank
Approaching the American base at Espiritu Santo, the Coolidge entered Segond Channel without receiving all the information needed to navigate the defensive minefield. One American mine exploded near the engine room and a second struck near the stern.
Captain Henry Nelson attempted to beach the damaged vessel so the people and cargo could be saved. Roughly 5,000 people evacuated in about 90 minutes before the ship slipped from the reef and descended stern-first into the channel. Only two lives were lost: fireman Robert Reid, killed in the first explosion, and US Army Captain Elwood J. Euart, who returned to the sinking ship to help trapped men escape and did not make it out himself.
Euart received the Distinguished Service Cross. His remains were recovered decades later, identified by the US Defense POW/MIA Accounting Agency and returned to his family for burial with full military honours in 2016. The human story deserves as much respect as the wreck’s scale and its diving fame.
Dive profile
One wreck, many different dives
Exact depths and routes vary between operators and as the wreck changes. This table is a planning guide, not permission to exceed your training.
| Area or experience | Typical character | Planning level |
|---|---|---|
| Bow and exterior orientation | Hull, portholes, forward structure, artefacts and anemone garden | Shallower Coolidge experience; operator may accommodate Open Water divers within strict limits, although Advanced experience is preferable |
| Forward cargo holds | Artillery, vehicles, munitions and wartime supplies, with some ambient-light areas | Advanced and often Deep/Wreck training; overhead routes require the correct penetration training and equipment |
| The Lady | Famous porcelain bas-relief repositioned in the first-class dining area, around 39–40 metres | Deep-diver skills and an operator-approved plan; may involve overhead and limited no-decompression time |
| Engine room and deeper interiors | Machinery, gauges, telegraph and complex internal passages | Generally technical/decompression territory, with suitable penetration training, gases and redundancy |
| Swimming-pool area and stern | Deep sections approaching the wreck’s maximum depth, with changing structural condition | Technical diving territory; appropriate gases, redundancy, decompression training and precise planning required |
What divers come to see
Signature SS President Coolidge highlights
The enormous starboard hull
The first orientation dive reveals the scale of the ship. Because the hull slopes deeper as you move aft, frequent depth and gas checks are essential even when the water is clear and calm.
Cargo holds and military equipment
Howitzers, guns, munitions, vehicles, medical stores, helmets and personal equipment remain powerful evidence of the ship’s final voyage.
The Lady
The porcelain relief of a woman riding a unicorn originally decorated the first-class smoking room. Local divers later secured it in a safer position after surrounding structure deteriorated.
Passenger-liner details
Light fittings, decorative surfaces, crockery and remnants of public rooms reveal the elegant civilian ship concealed beneath the wartime conversion.
Flashlight fish
On carefully planned low-light or night dives, flashlight fish can create a remarkable bioluminescent display in the darkness of the wreck.
Marine life and coral
Reef fish, moray eels, lionfish, anemones and passing pelagic species now occupy the wreck. Sightings remain wild and cannot be guaranteed.
Admire, do not handle
Why divers should stop kissing The Lady
For years, divers were encouraged to kiss The Lady for luck. That tradition no longer makes sense for a fragile historic object. Repeated contact can damage the porcelain, stir silt and encourage divers to focus on a photograph instead of depth, gas and team position.
Look closely, photograph without touching and leave every object where it is. The Coolidge and nearby Million Dollar Point form a protected marine-reserve area, and removing artefacts is prohibited. The wreck also appears on Vanuatu’s UNESCO Tentative List; that does not mean it is an inscribed World Heritage Site. Treat it as an underwater museum and a wartime memorial.
Do not rush the wreck
How many dives should you plan?
Two dives let you say you have seen the Coolidge; they do not let you understand it. The Vanuatu Tourism Office suggests spending at least two days, while local operators commonly recommend at least three diving days to reach highlights such as The Lady after suitable orientation and progression. Seeing the wreck broadly can take 10 to 15 dives, and even then many routes remain.
Orientation only
See the bow, exterior, shallower artefacts and the immense scale of the hull. Best for limited time or less experienced divers.
A meaningful introduction
Progress from exterior routes to cargo areas and selected signature features within certification and comfort limits.
A dedicated Coolidge trip
Build familiarity, vary routes and explore deeper or more complex areas if your training and the operator’s plan allow.
A giant wreck reached from the beach
Shore entry, conditions and equipment
The Coolidge’s accessibility is unusual: many dives begin from shore near Luganville, with a short surface swim or descent towards the bow, while some operators use a very short boat transfer. Either method avoids a long boat journey, but divers still need to manage entry conditions, surface movement and the return after a potentially deep dive.
Vanuatu diving is possible year-round, with the tourism office reporting water temperatures around 24°C to 29°C. Visibility and weather vary, and appropriate exposure protection depends on the season, dive duration, repetitive diving and personal comfort.
A computer, suitable exposure protection and at least one dependable light are relevant even on many exterior routes. Penetration, decompression or technical dives require a much more complete equipment configuration selected with the local operator—not an improvised collection of extra accessories.
Make a bucket-list dive a well-managed dive
The main risks to plan around
Depth creep
The wreck slopes from bow to stern, and clear water plus a large visual reference can make a diver feel shallower than the computer indicates.
Short no-decompression time
Many highlights sit near or beyond recreational depth limits. Agree on turnaround pressure, maximum depth and ascent obligations before the dive.
Overhead penetration
Loss of direct ascent, silt, darkness, sharp metal, entanglement and route-finding require specific wreck skills, lights, team discipline and redundancy.
Narcosis and task loading
Depth can impair judgement while photography, unfamiliar equipment and historical artefacts compete for attention. Keep the plan simple.
Ageing steel
Sections have collapsed and will continue to change. Never assume a route from an old video or previous trip is still available or stable.
Remote treatment
Vanuatu’s only hyperbaric chamber is in Port Vila, on another island from Santo. Confirm that it is operational, check emergency oxygen, communications and evacuation arrangements, and carry suitable diving insurance. Read the current Australian Government Vanuatu advice before travel.
If anything feels wrong after diving—unusual fatigue, pain, rash, tingling, weakness, dizziness, breathing difficulty or confusion—tell the dive team immediately, breathe emergency oxygen if directed and obtain professional diving-medical advice. Do not wait for symptoms to become severe.
A wreck is not a permanent building
Corrosion, collapse and changing dive routes
More than eight decades underwater have weakened decks, fittings and internal supports. Earthquakes, corrosion, gravity and diver contact all contribute to change. A magnitude 6.6 earthquake on 3 March 2023 caused the once-intact swimming pool, previously around 55 metres, to fall away to the sand at about 60 metres. The South Pacific WWII Museum documented the collapse after local operators inspected the wreck.
Features that appeared solid in an old photograph may now be displaced, partially collapsed or excluded from current dive plans. This is one reason local knowledge matters. Experienced guides track recent changes and select routes accordingly. Follow their briefing, maintain clearance from ceilings and unstable edges, and never move material to improve a photograph.
The guide who helped put Santo on the dive map
Allan Power and the Coolidge legacy
Australian diver Allan Power arrived with a salvage team in 1969 and became inseparable from the modern story of the wreck. He devoted decades to exploring the ship, guiding visitors and building international awareness of the Coolidge as a dive destination. He also trained and employed Ni-Vanuatu guides whose local knowledge continues the tradition.
Power was inducted into the International Scuba Diving Hall of Fame in 2011 and died in 2018. His historical collection was donated to the South Pacific WWII Museum, helping keep part of the Coolidge story accessible on land.
Before booking
How to plan an SS President Coolidge dive trip
Choose a Santo operator
Compare current accreditation, local guide experience, group size, gas quality, equipment, emergency oxygen and technical support if required.
Send your dive history
Provide certification level, recent dives, deepest recent dive, wreck experience, equipment configuration and any planned training.
Book enough diving days
Three days is a sensible starting point. Add more for training, technical objectives, photography or a slower progression.
Allow for a no-fly interval
Do not schedule flying immediately after your final dive. DAN recommends at least 18 hours after multiple dives or multiple diving days, and substantially longer after compulsory-decompression diving. Follow the most conservative applicable advice in the DAN flying-after-diving guidelines, your training and your computer.
Insure the real dive plan
Confirm the policy covers your planned maximum depth, wreck penetration or technical diving, recompression treatment and medical evacuation.
Build in non-wreck time
Add a reef dive, Million Dollar Point, Santo blue hole or beach day so the trip is not dependent on completing every ambitious wreck objective.
Beyond the Coolidge
Other diving and activities on Espiritu Santo
Million Dollar Point contains vehicles, machinery and other equipment dumped at the end of the Second World War. The USS Tucker provides another wartime wreck, while Tutuba Point, Aore Island and other reefs add coral, walls, gullies and marine life to a wreck-heavy itinerary. On land, Santo is known for blue holes, Champagne Beach, freshwater rivers and rainforest adventures.
See the official four-day Santo diving guide and the Vanuatu Tourism guide to Espiritu Santo.
Choose the right Vanuatu region
Coolidge diving or an Efate long weekend?
The SS President Coolidge is on Espiritu Santo and is best treated as a dedicated wreck-diving trip or Santo extension. Abyss’s Vanuatu Long Weekend Dive Escape is based around Efate and Moso Island, with warm-water reefs and a compact four-night format; it does not include the Coolidge unless a future itinerary expressly says so.
Choose Santo and the Coolidge if…
- The wreck is the main reason for your holiday.
- You can commit several days to progressive deep or wreck diving.
- Your training and recent experience suit the routes you want.
Choose the Efate long weekend if…
- You want a shorter overseas diving escape from Sydney.
- You prefer varied tropical reefs and an easier holiday rhythm.
- You want seven guided dives without adding an internal-island itinerary.
Start with the Abyss Vanuatu diving hub to compare trip styles, or view the Vanuatu Long Weekend Dive Escape.
Frequently asked questions
SS President Coolidge diving FAQs
How deep is the SS President Coolidge?
The wreck slopes from approximately 21 metres at the bow to around 70–73 metres at the stern. The route can become progressively deeper without an obvious visual transition, so continuous depth monitoring matters.
Can an Open Water Diver dive the Coolidge?
Some local operators may take Open Water divers to limited exterior areas within their certified depth. Most operators recommend Advanced certification for meaningful wreck exploration, while deeper and internal routes require Deep, Wreck or technical training as appropriate.
Is the SS President Coolidge a shore dive?
Usually. Many dives are reached from shore near Luganville, while some operators use a very short boat transfer. Either way, arrange the dive with an experienced local operator and Coolidge guide.
How many Coolidge dives should I book?
Plan at least three diving days for a worthwhile progression. Four to six dives provide an introduction; 10 to 15 dives reveal much more of the ship, subject to certification, conditions and safe profiles.
Can recreational divers visit The Lady?
The Lady is around 39 to 40 metres deep and is normally visited only after orientation dives. Whether the route is appropriate depends on certification, gas planning, no-decompression time, overhead exposure and the operator’s procedures.
Can divers enter the wreck?
There are cargo holds and internal routes, but entering a wreck creates an overhead environment. Penetration should only occur on a route supported by the diver’s training, equipment, recent experience and the local guide’s plan.
Is the Coolidge protected?
Yes. The wreck and surrounding area form part of a protected marine reserve. Do not remove, relocate or handle artefacts, and avoid contact with fragile structure.
When can you dive the Coolidge?
Diving is possible year-round, but water temperature, rain, visibility and travel conditions vary. Confirm the current season, equipment recommendation and operating schedule with the Santo dive centre.
Plan the Vanuatu trip that fits your diving
Compare Santo wreck diving with Efate’s tropical reefs
Use Abyss’s Vanuatu guides to decide whether the Coolidge should be a dedicated expedition, a Santo extension or a future trip after an easier first tropical escape.
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