Background
The Coolidge isn’t the Britannic. It doesn’t have that Everest level reputation of a dive that few people ever get to do. Large sections of the wreck sit in 60-90 feet of water, and even the deepest parts, like the stern around 210 feet, aren’t pushing the kind of depth or logistics the Britannic demands. What makes her special isn’t difficulty — it’s scale and story. She’s a 600+ foot luxury liner turned troopship, sitting nearly intact, with more cargo holds, decks, and rooms than you could reasonably explore in a single trip. That dual history is what makes her genuinely unique: one deck still hints at first-class luxury, the next is packed with jeeps, helmets, and rifles. It’s a wreck that’s approachable enough for recreational divers to enjoy the shallower sections, while still offering plenty to keep more advanced technical divers coming back.
This trip was my first big international dive trip in about a year, after taking time off to focus on the book. I’d been wanting to dive the Coolidge for a long time, and after the travel saga it took to actually get there — which I covered in gory detail in the trip report — I was more than ready to finally get in the water.
I dove the Coolidge eight times over the course of the trip, all with Pacific Dive in Espiritu Santo, Vanuatu. My guide for every dive was Max, who dove backmount doubles and knew the wreck well enough to navigate her enormous interior without hesitation. Operations manager Joel kept the whole technical side of the shop running — gas fills, rebreather support, bailout logistics — which matters more on a wreck this size than people realize.
Below are hot links to each dive if you want to skip straight to the pictures:
- Dive 1: Orientation dive
- Dive 2: Cargo Hold 2 + 1
- Dive 3: Drop tanks, medicine vials & the everyday debris of war
- Dive 4: The “Lady” in the main dining hall
- Dive 5: The Doctor’s Office
- Dive 6: The Pool & the Soda Fountain
- Dive 7: The Engine Room
- Dive 8: The stern
SS President Coolidge
The Coolidge started life as a luxury liner, not a warship — and that dual identity is a big part of what makes the wreck so interesting today. She was ordered from Newport News Shipbuilding on 26 October 1929 alongside her sister ship, the President Hoover, with her keel laid on 22 April 1930 and launched on 21 February 1931, christened by former First Lady Grace Coolidge with a bottle of spring water instead of champagne, since Prohibition was still in effect. She was completed and delivered on 1 October 1931.
Some quick stats on the Coolidge:
- Laid down: 22 April 1930
- Launched: 21 February 1931
- Completed: 1 October 1931
- Length: 654 ft 3 in (199.4m)
- Beam: 81 ft (24.7m)
- Speed: ~20-21 knots
- Capacity: 988 passengers in peacetime service; nearly 5,000 troops aboard at the time of her sinking
At the time of her launch, she and the Hoover were the largest merchant ships built in the United States. Operating out of San Francisco, she ran routes to Honolulu, Yokohama, Shanghai, Hong Kong, and Manila, setting speed records for trans-Pacific crossings in both directions — a genuinely fast, genuinely opulent way to cross the Pacific in the 1930s.
No general arrangement plans of the Coolidge herself appear to survive publicly, but her sister ship, the President Hoover, was built to nearly identical specifications — right down to shared Special Class accommodations. These give a good sense of what the Coolidge‘s decks looked like before her wartime conversion.
That peacetime career didn’t last. As tensions rose in Asia, the War Department began chartering the Coolidge for voyages to Honolulu and Manila starting in 1941, and she helped evacuate Americans from Hong Kong as the situation deteriorated. After Pearl Harbor, she was stripped of her peacetime finery, painted haze gray, fitted with guns, and turned into a full-time troopship. The first-class dining room and lounges that once hosted trans-Pacific socialites were converted into troop berths and operating rooms. It’s a strange thing to process underwater — swimming through a space that was built for luxury and repurposed for war within a decade of being launched.
Sinking
On 26 October 1942, the Coolidge was making her final approach into the harbor at Espiritu Santo, carrying roughly 5,000 troops — mostly the 172nd Infantry Regiment, a Vermont National Guard unit sent to help garrison the island’s rapidly expanding air base. Santo already had one operational fighter strip at that point, Turtle Bay, built in a 20-day rush that summer, but two more bomber fields were under construction to support the looming Guadalcanal campaign, and the 172nd’s job was to help defend that growing complex. She never should have been in danger. Exactly how the danger got missed is actually disputed: some accounts hold that the harbor’s minefield was simply never mentioned in the sailing orders prepared for her; others say a separate “rider” attachment containing the mine positions existed but never made it into Captain Nelson’s hands before departure. Either way, the result was the same — Nelson had no idea the mines were there. Unaware of the danger and worried about Japanese submarines lurking outside the harbor, he brought the Coolidge in through the largest, most obvious channel — exactly where the mines were waiting.
She went down fast. The ship struck the first mine near the engine room, then a second one closer to the stern moments later. Fireman Robert Reid — not a firefighter, but the crewman responsible for keeping the boiler fires burning — was killed instantly in the initial blast.
Within about 90 minutes, the ship’s full complement — roughly 5,340 troops and crew combined — calmly evacuated a vessel that was actively sinking under them. Most left almost everything behind, still believing the Coolidge could be salvaged and their gear recovered later. Among the cargo that went down with her was nearly the entire Pacific Theater’s supply of quinine, the era’s frontline anti-malaria medication — a loss that rippled well beyond the ship herself.
Only two men died. Fireman Reid, and Captain Elwood Euart, who’d already made it off safely, then went back aboard when he heard men were trapped in the infirmary. He lashed himself to a rope so the trapped men could climb to safety — but by the time it was his turn, the ship had begun rolling and sliding into the channel, and he was pulled under before he could climb clear. He was posthumously awarded the Distinguished Service Cross the following February, just under four months after the sinking. Remarkably, his story didn’t end there: his remains stayed entombed in the wreck for 70 years, until a local dive guide discovered them in 2012. A U.S. Army recovery team confirmed his identity through DNA testing, and in August 2016, Captain Euart finally came home, buried with full military honors in Rhode Island — nearly 74 years to the day after he died saving his men.
U.S. Navy photographs, National Archives (80-G series), October 26, 1942.
The Fallout: Halsey Wants Blood
Someone was going to answer for this, and Admiral William “Bull” Halsey, commanding the South Pacific Area, made sure of it. Halsey ordered a preliminary Court of Inquiry, which convened November 12, 1942 aboard the destroyer tender USS Whitney and recommended further charges against Nelson. Halsey then personally charged Nelson with gross negligence for the loss of the ship, two of his crew, and all the government property aboard her.
A military commission convened in Nouméa on December 8, 1942, heard the case over seven days — and acquitted Nelson. The commission found that merchant marine captains like Nelson simply weren’t given the tactical information they needed — most notably, where the “friendly” mines actually were. Furious, Halsey pushed for a third investigation, this time through the Coast Guard. It also cleared him, closing the matter for good. Three separate inquiries, three separate exonerations. Nelson went back to California and, in due course, took command of another large merchant ship — his career fully intact, despite Halsey’s best efforts.
It’s a good reminder, standing in the wreck today: the Coolidge didn’t go down because anyone aboard did something wrong. She went down because someone, somewhere else, forgot to tell her captain where the danger was.
The Wreck
Today the Coolidge lies on her port side on a sloping seabed, close enough to shore that she’s one of the largest shore-accessible wrecks in the world. The bow sits at her shallowest point, around 60 feet, while the wreck slopes away into the depths, with the stern resting at about 210 feet deep. That range is a big part of what makes her so approachable: recreational divers can do a full orientation dive without ever going past 40 meters, while technical divers have the run of the entire ship, cargo holds to engine room to stern.
Given her size, it’s remarkable how intact she is today. Most of the hull remains in a single piece, and because Vanuatu declared the wreck protected not long after independence, nothing has been salvaged in decades — the jeeps, trucks, guns, and personal effects are still sitting more or less where they were left in October 1942. A few large holes were cut into the starboard side of the hull for salvage purposes before that protection took effect, and those cuts now double as convenient entry points for divers into the cargo holds.
You’ll see helmets, rifles, medicine bottles, and gas masks scattered through the interior, alongside more evocative pieces of her old civilian life — chandeliers, marble fireplaces, and, most famously, “the Lady”: a relief carving of a woman in Elizabethan dress riding a horse, once mounted in the first-class smoking room and later moved to the dining room. Divers have kissed her for good luck for decades, and you’ll see her in Dive 4 below.
Dive 1: Orientation Dive
Our first dive was a straightforward orientation swim — the goal wasn’t to see everything, just to get situated on a wreck this size before diving into the more focused dives that would follow over the next several days. Max, my guide for the entire trip, led the way.
The tide worked against us right out of the gate. It was very low that morning, which meant a long walk down to the water and extra effort staging bailout tanks before we’d even gotten wet. Once in, the dive itself was short and simple — a brief swim-through just to get a feel for the wreck’s scale and orientation before the real exploration began.
Even on this first, low-key dive, the bow area gave a preview of what was still ahead — the ship’s 3-inch gun and anchor are both sitting right there, heavily encrusted after 80-plus years underwater, a reminder that this was a warship as much as it was ever a luxury liner.
It wasn’t a dive full of dramatic highlights, but it did what it needed to: staging a bailout tank, getting acquainted with entry/exit points and the route to the ship, making sure all my dive and camera equipment were working, and getting familiar with Max’s guiding style before we started pushing into cargo holds and deeper sections.
Dive 2 : Interior Orientation – Cargo Hold 1 & 2
This was our first dive spent primarily inside the wreck — a natural progression after the orientation dive, easing into penetration without pushing too hard on distance or depth. We stayed within about 100 feet the entire dive, and while the spaces inside Cargo Hold 2 and Cargo Hold 1 got a little tight in places, there was almost always a short, clear path back out if needed.
We started in Cargo Hold 2, home to some of the wreck’s most recognizable cargo: jeeps still sitting where they were loaded, an upside-down tank, and stacks of gear that never made it ashore. From there we worked our way into Cargo Hold 1, before following the line back to the staging area at 20 feet to run our deco.
One of the best finds of the dive was a small brass “GENTLEMEN” sign, still legible after more than 80 years underwater — a strange little relic of the ship’s luxury-liner days sitting quietly among military cargo.
Dive 3 – Medical Supplies, Aircraft Drop Tanks, Refrigeration Unit
We kept pushing further into the wreck’s interior on this dive, working through corridors and cargo spaces that mixed the ship’s civilian past with her wartime cargo in equal measure.
One of the more striking details was a row of toilets in a corridor, lit from above by shafts of light streaming from above through what were once portholes and light from the far end of the corridor. Since the Coolidge rests on her side, those portholes now sit at the “top” of the wreck rather than the side, turning an ordinary hallway into one of the more photogenic spots on the whole ship.
We also passed a small stash of medicine — glass vials of surgical sutures, still legible after more than 80 years, alongside a scatter of aircraft drop tanks stored as cargo. In Cargo Hold 2, I finally got a clean shot of the upside-down tank we’d passed by (but couldn’t photograph well) on the previous dive.
The Coolidge also carried a genuinely large refrigerated cargo hold for a 1931 liner — 70,000 cubic feet of it — and part of that cooling system is still recognizable in the wreck today, a reminder that even her cargo infrastructure was considered cutting-edge in her day.
Dive 4 – The Lady and the Main Dining Hall / Saloon
The main objective for this dive was simple: go see the Lady. We made our way to the main dining hall, once the social heart of the ship’s first-class experience, now sitting quietly on its side more than 80 years later.
The Lady herself — a relief carving of a woman in Elizabethan dress riding a horse — is mounted high on the wall, which meant photographing her required some awkward angles given how the wreck lies on its side. I got a wide shot to show her in context, then moved in close for a detail shot, rotated 90 degrees to correct for the ship’s orientation and show her the way she was meant to be seen.
Nearby, one of the dining hall’s chandeliers made for one of the best photo opportunities of the trip. In natural light it’s a fairly unremarkable encrusted shape hanging from the ceiling — but lighting it directly revealed a beautiful starburst pattern still visible in the fixture’s ironwork, a small reminder of how ornate this room once was.
From there, we worked our way back through the corridor and into Cargo Hold 2 and Cargo Hold 1 for some further exploration, revisiting territory from Dive 2 with a bit more time to look around. As we wrapped up near the bow, we came across a turtle cruising past with a couple of remoras in tow — a nice, unplanned close to the dive.
Dive 5 – Doctors Office
This dive took us to the ship’s Doctor’s Office, tucked away in the corridors that once served the Coolidge‘s medical needs — first for her civilian passengers, later for the troops she carried.
On the way in, we passed a typewriter sitting quietly in the debris, along with a stretch of tiled wall — small architectural details that rarely get attention compared to the more dramatic cargo, but are a nice reminder of how finished and civilian this ship once was. Once inside the office itself, there were still bottles and other fixtures from the doctor’s original workspace, a smaller-scale echo of the medicine vials and drop tanks we’d seen scattered through the cargo holds on earlier dives.
Along the way, looking straight up through the corridor, the portholes lined up in a striking pattern of light — one of the better compositional shots of the trip, even without much planning behind it. I also managed to catch a good photo of Max descending into the wreck ahead of me, which captures the scale of these penetration dives better than most of my other shots.
It wasn’t a dive full of major discoveries, but a solid, steady one — the kind that reminds you how much of this wreck rewards patience over spectacle.
Dive 6 – Pool, Soda Fountain, 20mm Cannons
The main goal for this dive was the ship’s swimming pool — though as Max had warned me beforehand, there’s not much “pool” left to see. Decades of collapse have buried most of it under the wreck itself; what remains is really just the edge, visible where it meets the sand. Still, it was a good dive for building some depth ahead of other dives later in the trip.
From there we made our way to the soda fountain, which once sat poolside for guests. It’s heavily encrusted today, barely recognizable as the cheerful amenity it once was, but the shape is still there if you know what you’re looking at — and there are still plenty of soda bottles scattered in the debris nearby.
As we worked our way back up the wreck, shedding depth, we spent some time exploring more broadly, which turned out to be one of the more rewarding stretches of the dive. Max struck a pose on one of the ship’s 20mm anti-aircraft cannons for a fun photo, and I got a shot of the second gun as well, coral and sponge growth creeping down its barrel. We also came across a scatter of old plates, along with a porthole that had been reinforced with an internal wire mesh — a small design detail I hadn’t noticed on any of the other portholes so far. Nearby, we found a gas mask, and cleared away some of the silt and debris to get a cleaner look at it.
We also passed the same turtle from earlier in the trip, cruising along a different part of the wreck — always nice to see a familiar face.
Dive 7 – Engine Room
The primary objective for this dive was the engine room, sitting about two-thirds of the way down the ship. It’s accessed through a hole cut into the hull by salvagers decades ago, and it’s an easy entry point into a genuinely massive space — one of the best engine rooms I’ve seen on any wreck.
Inside, the highlights kept coming. The engine telegraph is still frozen in place, its indicator stopped on “Finished With Engines” — about as poignant a detail as a wreck can offer, marking the exact moment this ship’s working life ended. Nearby sits the starboard electric motor, along with two separate banks of dials and gauges, all tilted 90 degrees from how they’d have been read in 1942, since the wreck lies on her side rather than upright (I rotated the photos to show how they would have been normally). There’s a large condenser dominating part of the space, and beyond that, what feels like miles of pipes threading through the room in every direction.
I’d planned for a 60-minute dive here. We ended up spending 90, and it still didn’t feel like enough time to take it all in.
Dive 8 – Stern
The final dive of the trip took us to the deepest part of the wreck: the stern. Visibility was the best I’d had all week, easily over 60 feet, which was exactly what I needed for the wide-angle natural light shots I’d been hoping to get.
We dropped in and made our way down along the starboard side of the hull — a long swim to reach the stern, but a good one, since it gave a real sense of just how big this ship actually is. Along the way we stopped to investigate the obvious mine-strike hole in the hull, the same kind of damage that sent her to the bottom in the first place. You can really appreciate the scale of the ship watching Max drop down alongside it.
Continuing along the hull, a stingray cruised past out in the sand for a brief detour before we pushed on toward the stern. As we got close, I hung back to get some natural light shots with Max in frame, using him for scale against the sheer size of the stern, rudder, and prop shaft. I’d really hoped to get a clean shot of the “Coolidge” name lettering at the stern, but the letters hadn’t been cleared of growth recently, and clearing them myself would have eaten into bottom time I didn’t have to spare at that depth.
We worked our way around the stern and stopped at the massive inverted 5″ gun mounted at the very back of the ship, then slowly made our way into the cargo holds at the rear, where we found a spare propeller blade tucked away, along with a jeep chassis and wheels. There was also an odd fixture I still haven’t been able to identify — my best guess is some kind of cooker, possibly a rice cooker, but I’m honestly not confident in that ID. If anyone reading this recognizes it, I’d love to know. We passed a tiled surface as well, though after swimming the full length of the ship’s interior on this dive, I’ve lost track of exactly which compartment it belonged to.
From there we continued through the ship’s interior, working our way all the way up through Cargo Hold 1 before finally exiting and running our deco.
It was another long one — 105 minutes — and about as perfect a way to close out the Coolidge as I could have asked for.
Stern Photo Gallery
Interior Photo Gallery
Summary
Eight dives on the Coolidge still only scratched the surface of what’s down there. From the bow gun and anchor on that first orientation dive, through cargo holds full of jeeps and tanks, the Lady and her chandeliers, a doctor’s office and a pool that’s mostly vanished under the wreck itself, all the way to the engine room and finally the stern — she’s less a single dive site than an entire small town, sunk and left exactly as it was on the day it went down.
If you’re planning your own trip, the trip report covers the logistics side of things — travel, accommodation, and working with Pacific Dive. And if you’re heading to Espiritu Santo anyway, don’t miss the Corsair and Million Dollar Point, both of which get their own dedicated posts.
AI Transparency
This post was written in collaboration with Claude (Anthropic), based on my dive notes, notebook photos, and historical research. All firsthand dive accounts, photos, and opinions are my own.
