Navio do IPIMAR

Also known as: Arrastão IPIMAR, IPIMAR wreck

An iron trawler intentionally sunk off Faro in 1995, cleared inside for penetration between 22 and 30 metres.

Last updated September 2026

The dive

Descend onto sand off Faro, on the calmer, eastern end of the Algarve, to a single intact hull resting where it was deliberately sunk in 1995, listing gently to one side. Divers follow corridors through an interior that was cleared of machinery when the wreck was prepared, working the full length of the hull, not just its exterior. Around the structure, shoals of pouting and black seabream work the iron, with large conger eels holding in the compartments and spider crabs sharing the same crevices; unnamed soft growth softens the metal further out. A single catalog listing puts the hull at roughly 45 metres long and 7 metres high, a figure that has not been checked against an official vessel register.

What makes it special

Within the Algarve's run of named wrecks, most are war losses: older iron and steel hulls that went down decades ago and now sit broken and current-exposed. This trawler is different on both counts. It was sunk on purpose, five years after a wider IPIMAR reef-building program began off this same stretch of coast, specifically to create habitat and a dive site. And it survives whole, an intact hull with a cleared interior divers can follow end to end.

History and origin

An iron fishing trawler, sunk here in 1995 on the orders of IPIMAR, the Portuguese Institute for Fisheries and Sea Research (now folded into IPMA), to build an artificial reef. The sinking sits inside a wider institutional program: an academic paper describes an Algarve artificial-reef system that IPIMAR established as a pilot project in 1990, with concrete-module installations several kilometres off Faro and a separate cluster off Olhão. That 1990 program built concrete modules, and this trawler went down five years later under the same institutional name. The two projects share an institution, a stretch of seabed and a fisheries-habitat purpose, but they are two different kinds of structure built five years apart: related programs under one institution, each with its own installation.

Know before you go

The interior is penetrable, and that is the main reason less experienced divers are steered elsewhere: the catalog listing that names this site rates it outright for more experienced divers, and the operator's own description, though it avoids that phrase, backs the same guidance by presenting the cleared interior as a route to follow end to end. Depth adds a secondary margin against recreational no-decompression limits toward the deeper end of the profile. No marine reserve, permit or diver quota applies to this wreck specifically, consistent with the rest of the Algarve coast.

Why Dive Navio do IPIMAR

What makes this dive site stand out.

  1. Intact hull, cleared interior

    Machinery was removed after the 1995 sinking, opening routes through several compartments.

  2. Deliberately scuttled

    Sunk on purpose in 1995 to build habitat, five years into a wider IPIMAR reef program off this coast.

  3. Rated for experienced divers

    The catalog listing names this a site for more experienced divers; the operator's own copy backs it up with a guided route through the cleared interior.

  4. Shoals over an iron hull

    Black seabream and pouting shoal the wreck; conger eels and spider crabs work the structure.

Depth & Profile

22m
Min depth
30m
Max depth
22–30m
Typical range
WreckArtificial reefSand

Location

36.9667°N, 8.0011°W

Conditions & difficulty

Visibility
10m
Best season
March-May, September-November

That spring-and-autumn window is the area-wide default across the Algarve; the catalogue listing that names this specific wreck states water clarity is better from October to March instead, close to the opposite half of the year.

AdvancedMin cert: Advanced Open Water

Depth stays within Advanced Open Water limits; the penetration option through the cleared interior, more than the depth itself, drives the aow grade.

Summary

The penetrable interior is the main factor; depth adds a secondary margin against no-decompression limits.

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: The interior was cleared for penetration. The catalog listing that names this site rates it for more experienced divers outright, and the operator's own description of a guided route through the cleared compartments supports the same caution.Follow the cleared route through the compartments and keep track of the way back out; do not free-swim off it.
  • Depth: At 22-30m, some profiles run close to recreational no-decompression limits.Track bottom time closely toward the deeper end of the dive; the hull is not one flat depth.

Marine Life

Atlantic spider crabMaja brachydactylaPoutingTrisopterus luscusBlack seabreamSpondyliosoma cantharusCommon octopusOctopus vulgarisEuropean congerConger conger

Rules and permits

  • Conduct: no touching, no taking anything, no disturbing wildlife.

Rules for Algarve

Frequently Asked Questions

How deep is the IPIMAR wreck?▾

The operator that names this site and the one independent catalog listing found both give the same figures: 22 metres average, 30 metres at the deepest point. An older single-figure database record lists 24 metres, close to the midpoint between the two.

Can beginners dive the IPIMAR wreck?▾

No source treats it as a beginner site. The catalog listing states outright that it suits more experienced divers; the operator's own description doesn't use that language but describes the same cleared interior as a guided route to follow, without presenting it as a beginner dive. The penetration option, more than the depth, is why less experienced divers are steered elsewhere.

Is this the same IPIMAR reef as the concrete modules near Faro?▾

No, and the two are easy to conflate. This trawler was intentionally sunk in 1995, five years after IPIMAR began a wider artificial-reef program in 1990 using sunk concrete modules off the same stretch of Algarve coast. The two share an institution and a habitat purpose, but they are two different kinds of structure built five years apart: related programs under one institution, each with its own installation.

Which end of the wreck faces the open sea?▾

This is unresolved: the bow is placed facing open water in one account, and the stern in another. This page carries both instead of settling on one.

What is the water temperature like at the IPIMAR wreck?▾

That is contested too. The operator's own page gives 16-20C for this specific site, while a separate catalog source puts the same wreck's annual range wider, at roughly 14-22C. Expect somewhere in that combined span depending on season.

Is the IPIMAR wreck inside a marine reserve or does it need a permit?▾

No. No marine reserve designation, permit requirement or diver quota has been found for this wreck, consistent with the rest of the Algarve's dive sites.

How big is the wreck?▾

One catalog listing puts the hull at about 45 metres long and 7 metres high. Treat that as a single-source estimate until an official vessel register confirms it.

Is there a dive centre or departure port for the IPIMAR wreck?▾

None is documented specifically for this wreck. Access is understood to be by boat given its distance from shore, but no operator, marina or price currently appears attached to it.

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