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Black Cat: A Calm Day, a Charted Rock and a Bilge Pump Nobody Felt Confident Using

🕑 5 min read words Safety • Incident • Navigation

Vessel: BLACK CAT — 17 m aluminium passenger catamaran, built 1994, two Yanmar diesels, one in each hull
Date / Location: 31 January 2026, near Archway Rock, entrance to Akaroa Harbour, New Zealand
Conditions: Calm weather
Outcome: 38 passengers and 3 crew evacuated without injury; vessel a total loss
Status: Interim report only. The inquiry is ongoing and the final report will carry the analysis, findings and recommendations
Source: TAIC Final Interim Report MO-2026-201, August 2026

Interim facts · No simulator until the final report · 6 min read

What The Interim Report Says Happened

The Black Cat was on a regular two-hour scenic cruise from Akaroa with 38 passengers and 3 crew. The master chose the route on the day. With calm weather, the master took the vessel out past the harbour heads to Scenery Nook, then decided to visit Archway Rock on the way back.

At about 1212, a crew member took photographs of the rock. A few seconds later there was a bump and a scraping sound. The commission established the position from two independent sources, the photographs’ location data and an on-board GPS tracker, and found it aligned with a charted submerged rock of unknown depth. One crew member had noticed shortly before that the vessel was approaching the rock from an unusual direction, and had gone to speak to the master.

The master thought they might have hit a crayfish pot float. About a minute later the bilge alarm sounded. The master climbed into the aft compartment, opened the starboard engine room bulkhead door, saw water around the top of the engine, and shut and secured the door again.

On the bridge, the steering had stopped, along with the CCTV and the PA system, and the starboard engine and propulsion had stopped. The emergency steering is in the starboard hull and could not be activated. The master told the crew to start the engine-driven bilge pump. Two crew went to the control station but were not confident in how to operate the system, so it was not engaged. Smoke or steam began entering the main cabin from the engine room.

The master called two nearby company vessels on VHF and headed for a beach. Passengers and crew put on lifejackets, which took 10 to 15 minutes. At about 1232 the master broadcast a Pan-Pan. Other vessels ferried passengers from the stern, and the evacuation was complete by 1240. A Coastguard vessel brought a portable pump aboard, but the vessel kept settling and listing. At about 1247 the vessel grounded again near the beach, and the master left on a jet ski. Nobody was injured. A salvage attempt failed, and the vessel broke up in heavy weather.

What The Interim Report Does Not Say

This is a factual interim report. It does not give causes, findings or recommendations; the commission says the final report may differ from it. We are not drawing conclusions it does not draw. In particular, it does not say why the vessel approached the rock the way it did, or why the vessel lost steering and propulsion.

Facts Worth Taking To Your Own Vessel

These come from the facts as stated, not from any conclusion.

The vessel carried four independent bilge pumping systems (a 24 V electric pump, a 230 V electric pump, an engine-driven pump and a manual pump), yet the crew who went to start the engine-driven one were not confident in using it. Equipment you cannot operate under stress is not equipment you have.
Services were lost in the flooded hull. The steering, CCTV, PA, starboard engine and the emergency steering all failed together. Where do your emergency systems physically sit, and what do they depend on?
Twenty minutes separate the bump at about 1212 and the Pan-Pan at about 1232, the first formal call for help on the radio recorded in the report, although the master had already called nearby company vessels. The lifejackets took 10 to 15 minutes.
A concern was raised, and the contact came seconds later. A crew member noticed the unusual approach and was on the way to say so. A habit of speaking up earlier, or a briefing that expects it, is a control.
Help came from people nearby. Company vessels, a Coastguard rescue boat and a jet ski moved passengers and crew quickly. The evacuation without injury is the part of this case that worked.

Where The Routine Cruise Broke — Stage By Stage

This is a questions table, not a findings table. It maps the interim facts to the five checkpoints we use, and marks what the report has not yet addressed.

Stage	What the interim facts show	Question to ask on your own vessel
1. Plan the route	The master chose the route on the day, decided to add Archway Rock and approached it from an unusual direction. A charted submerged rock of unknown depth was at the impact position.	Does the route plan mark every charted hazard, with a safe distance and approach direction?
2. Test the plan	Not addressed in the interim report.	Who checks a change of plan against the chart before the vessel commits to it?
3. Authorise and brief	The crew member who noticed the approach went to speak to the master.	Does every crew member know they are expected to raise a navigation concern, and to whom?
4. Watch and equipment	The crew were not confident operating the engine-driven bilge pump. Emergency steering was in the flooded hull.	Has every crew member started every pump on the vessel? Where is each emergency system, and what does it need to work?
5. Decide and escalate	A Pan-Pan about 20 minutes after the strike. Evacuation complete by 1240. The master tried to beach the vessel and it grounded again.	What is the trigger to call for help and to evacuate, and who decides?

Human Element Analysis

Equipment Familiarity

Four pumping systems did not translate into a working pump, because the people sent to start the engine-driven one were not confident. This is a training and drill question that the final report may or may not address; it is the kind of gap a drill finds cheaply.

Speaking Up

One crew member saw something unusual and went to say so. The interim report does not tell us whether it would have made a difference. It does show the safety value of a crew who notice, and a bridge that expects to be told.

Escalation And Evacuation

The vessel was in calm water with other vessels close by, and everyone was off safely. The same sequence in cold water, or with no one nearby, would have been very different.

Industry	Incident	The Parallel
Offshore	Piper Alpha, North Sea, 1988	Fire pumps were on manual and no one at the right place knew or was able to start them. Equipment existed, but a person who could operate it, at the moment it mattered, did not.
Aviation	Qantas Flight 32, 2010	An engine failure damaged many systems at once. The crew worked the problem as a team and landed safely, helped by knowing their aircraft’s systems and sharing the workload.
Space	Apollo 13, 1970	A failure took out the main spacecraft’s services. The crew used the lunar module as a lifeboat. The contingency was understood before it was needed.

Recommended Actions

The interim report makes no recommendations, and we have not invented any. Wait for the final report. In the meantime the questions in the tables above are a useful drill agenda for any small passenger vessel.

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