Doña Marilyn Wreck
Also known as: Dona Marilyn Wreck, Donya Marilyn Wreck, Manoc Manoc, MV Doña Marilyn
A 1988 Philippine ferry on her starboard side 32 km north of Malapascua, her hull the only hard bottom on the sand plain and now carrying black coral.
Last updated August 2026
The dive
Ninety minutes north of the island the boat stops over open water, and the ship underneath is lying on her side. The sand around her is flat and empty, so the hull is the only thing standing for as far as the water lets you see. Soft coral has taken her uppermost surfaces. The masts run horizontally at about 21 metres, parallel to a seabed 12 metres below them.
The dive gets decided on the boat. Stay high on the flank and the masts and the whole thing sits between 18 and 21 metres, which is an unhurried dive on a very large object. Drop to the sand at her lower edge and the clock is short. Whitetip reef sharks are reported resting down there, and blue-spotted ribbontail rays work the sand along the hull.
Then the nets, which are the thing to look at and the thing to stay clear of. They were lost by fishing boats long ago, and they now drape the structure and sit encrusted in the coral that grew over them. Divers call the site spooky and this is what they mean by it. A giant moray is reported living inside her, and sweetlips hold station in the shade under the hull.
Going inside is a separate dive. She is described as fully penetrable, and the operators who run her gate the interior behind wreck training and will not fold it into a fun dive. A ship lying hard over has an interior rotated ninety degrees, so the floor is a wall and the doorways are in the wrong place.
What makes it special
The hull is the reef. Nothing on the plain around her is hard enough for a coral to attach to, and the ship supplied what the seabed could not. Black corals grow on her, and they are an endangered group; she is a successful artificial coral area on a stretch of bottom that would never have produced one1.
Her story did not stop in 1988. Salvage crews have come for her twice, and the second time they took part of the ship with them. A hull that is the only reef for kilometres is worth more where it is than as scrap, and the case for leaving her alone rests on the ecology. The ferry is almost beside the point.
Her neighbours make the comparison easy. The Pioneer starts below 40 metres and is a technical dive. The Tapilon is broken up and shallow. This is the one large hull off Malapascua that a diver with an advanced card can work along end to end, and the only one of the three that has an interior worth a qualification.
History and origin
She was completed in Japan in July 1966 as the Otohime Maru. Sulpicio Lines bought her in 1976 and renamed her Doña Ana, and after a fire in October 1978 she was refitted and went back to work under a third name, Doña Marilyn. The same company owned her sister ship, the Doña Paz.
She left Manila for Tacloban on 23 October 1988 and sank the following day in Typhoon Unsang, known internationally as Ruby2. Several hundred people died.
What happened to her afterwards is the part a diver meets. In 2004 a metal company began removing the wreckage and was stopped when the Philippine Tourism Authority ordered it not to proceed1. Then, in August 2018, a ship arrived and started cutting. Divers who went out that week describe a barge on station for about two days and roughly a third of the wreck gone. The coast guard checked whether anyone held a permit, the municipality condemned the work, and an investigation opened into who was behind it1.
Daanbantayan's answer since has been blunt. Salvaging anything inside its waters needs a mayor's permit, and the town says it will never issue one1. Two attempts, two interventions, and a ship that is smaller than she was.
Know before you go
A cutting tool is the one piece of kit this wreck asks for that the rest of the island's diving does not. The nets are grown into the coral and they hang across the structure at the depths you are swimming.
Decide the profile before you get in the water. The upper flank is the long version of this dive and the sand is the short one, and the current can arrive on either. Inside the hull needs a wreck qualification, a torch and a backup, and a route agreed on the surface before anyone is at a doorway.
Part of the ship was cut away in 2018, so there is cut steel and there are collapsed sections. Stay off the structure.
No permit, quota or reserve boundary governs this dive. She lies outside the areas Daanbantayan has protected by ordinance3, and what has kept salvage crews off her is the town's refusal to issue permits1.
Then the distance, which is easy to leave until it matters. Nobody can treat a bent diver on the island. The nearest hyperbaric unit is at Mandaue, over on Cebu, and from this site the journey there opens with ninety minutes back to the beach; the hospital closest to the crossing is graded as an infirmary and does not do critical care. Find out what oxygen reserve the boat runs with when you book the day, and put the trip out and back into the plan.
Why Dive Doña Marilyn Wreck
What makes this dive site stand out.
- Black coral on the hull
The wreck is the only hard bottom on the sand plain, and black corals grow on it
- Cut down by salvage
A 2018 salvage took part of her, and divers describe roughly a third of the ship gone
- Two profiles on one wreck
The upper flank and masts at 18 to 21 m, or the sand at her lower edge past 30
- Nets grown into the coral
Lost fishing nets drape the structure and are encrusted into the coral growth
- Ninety minutes offshore
The longest routine crossing from Malapascua and the most weather-dependent
Depth & Profile
Location
11.5832°N, 123.9944°E
Conditions & difficulty
Summary
The deep half of the dive sets the grade. The sand at her lower edge is past 30 m, the current here can run strong, lost nets hang over the structure, and the site is 90 minutes from the beach on an island with no chamber. The 18 to 21 m profile on the upper flank is a considerably easier dive than the numbers suggest.
Safety considerations
What can go wrong here, and what divers do about it. Conditions change - take the briefing from the operator on the day.
- Overhead: Lost fishing nets are draped over the structure and grown into the coral, and they hang where divers swim.Carry a cutting tool. Keep gear tight to the body and clear of the structure.
- Depth: The sand at her lower edge is past 30 m, which is a short no-stop dive at the limit of an Advanced certification.Pick the profile before the descent and hold it. The upper flank at 18 to 21 m is the long version of this dive.
- Current: Current on the wreck is reported as capable of running strong, and it can arrive on a dive that is already deep.Let the operator judge whether the day suits the deep option, and leave the sand for quiet water.
- Overhead: The interior is rotated ninety degrees because she lies on her side, so doorways, floors and ladders are not where the eye expects them.Wreck training before entry, a torch and a backup, and a route agreed on the surface.
- Structure and sharp edges: Part of the ship was cut away in 2018, which leaves cut steel and collapsed sections where older descriptions promise an intact hull.Treat the structure as unsurveyed. Hover, do not settle on it.
- Remote location: Ninety minutes of open water from the beach, on an island with no recompression chamber.Ask how much oxygen the boat carries before booking, hold insurance that pays for evacuation, and treat the crossing as part of the dive plan.
Marine Life
Regulations
No dive permit, quota or reserve boundary applies. What the municipality controls here is salvage. Removing anything from the wreck needs a mayor's permit, and Daanbantayan's stated position is that none will be issued.
Frequently Asked Questions
How deep is the Doña Marilyn wreck?▾
The growth on her uppermost side starts at about 18 metres, and the sand she lies on is somewhere between 30 and 33. Three sets of figures circulate for the seabed, and the gap between them is genuine: one sits at around 30 metres, one range ends at 32, and one maximum of 33 arrives with the masts at 21 metres and the seabed 12 metres below them. Plan against 33. You will also see 25 metres attached to this wreck. It matches nothing on the ship, it is neither the top of her nor the bottom, and the same round number turns up on unrelated dives nearby.
What certification do you need for the Doña Marilyn?▾
Advanced Open Water, and it is the sand that sets it. The upper flank and the masts sit between 18 and 21 metres, which a competent Advanced diver can dive at leisure. The lower edge of the hull is past 30 metres, which is the ceiling of that certification and a short no-stop dive, and the current here can arrive while you are down there. Going inside is a separate qualification again. Operators ask for PADI Wreck Diver or TDI Advanced Wreck before they take anyone into the hull, and they sell it as its own dive, never as an extra on a fun dive.
Is the Doña Marilyn wreck still in one piece?▾
No, and almost everything written about her says otherwise. For years she was described as surprisingly intact. A salvage ship worked the site in August 2018, and divers who went out that week describe a barge on station for around two days and roughly a third of the wreck gone. A vessel was impounded and the municipality moved to build a case. What was taken and what was left has never been surveyed, so go expecting a different ship from the one older descriptions promise, with cut steel and collapsed sections where the intact hull used to be.
Is the Doña Marilyn wreck protected?▾
Not by a designation. Daanbantayan has eleven areas protected by municipal ordinance and this wreck is not one of them, so there is no reserve boundary, no quota and no diver permit. What protects her is narrower. Salvaging anything inside the municipality's waters needs a mayor's permit, and Daanbantayan's stated position is that it will never issue one. Add a national tourism authority stepping in to stop a metal company in 2004, and that is the whole legal history of keeping this ship on the seabed.
Can you see thresher sharks on the Doña Marilyn?▾
No. The threshers moved to Kimud Shoal in 2022, the pre-dawn shark boat goes there, and this wreck is 32 kilometres north of all of it. Guides and older pages still send people to Monad Shoal for threshers, which is a separate correction and not this dive. What the wreck actually holds is whitetip reef sharks reported resting on the sand under the bow, blue-spotted ribbontail rays working the sand, a giant moray in the structure, and eagle rays or devil rays passing in the blue if you look off the hull.
Is the 90-minute boat trip to the Doña Marilyn worth it?▾
It depends on what you have already dived, which is the honest answer for a site that costs a whole day. The island's other wrecks are ten minutes and half an hour out, and the shark trip leaves before dawn and is back for breakfast. This one takes the day and moves with the weather. What it buys is the biggest hull in the area, an interior for anyone trained to use it, and a reef that exists only because a ship sank on a bare seabed. Divers who go are usually a few days in and have already done the sharks.
Why is the Doña Marilyn wreck also called Manoc Manoc?▾
Because of where she was found. The wreck was first spotted by a fisherman working near Manoc-manoc Island, also written La Manok, and the name followed the dive site onto some boat lists. It is the same wreck. You will also meet Dona Marilyn without the tilde and Donya Marilyn, which are all spellings of one name, and the vessel herself is properly the MV Doña Marilyn.
References
- 1.SunStar Cebu, August 15, 2018 — Who's salvaging Doña Marilyn in Malapascua?
- 2.UCA News, November 1, 1988 — UCAN Feature: Typhoon Unsang wreaks havoc, leaves hundreds dead
- 3.People and the Sea, October 2019 — Coral Reef Monitoring Report 2018
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