What the handover didn’t say

On 6 May 2025, three crew members aboard the tanker Wisdom Venture suffered burns during maintenance on a steam valve near Sydney. Residual hot condensate escaped when the valve was opened.

The Australian Transport Safety Bureau identified a permanent modification to a drain line that had not been documented or formally assessed. It predated both the outgoing and incoming chief engineers. The change was absent from previous handover records and had escaped superintendent inspections.

The relieving chief engineer had joined on 17 April for a parallel handover - 19 days before the accident.

Yet the altered arrangement and its risks had not been properly communicated. Insufficient cooling time and incomplete verification of depressurisation also contributed to the injuries. ^[1]

The case raises a practical question about what overlap achieves. Time together creates an opportunity to exchange knowledge. Its value depends on whether the information being exchanged accurately describes the ship.

A modification can become familiar to successive crews while remaining absent from drawings, maintenance records and risk assessments. Each person taking over then inherits the same incomplete explanation.

The detail that changes the job

MAIB's Safety Digest 1/2021 describes a generator starter motor sent ashore for overhaul. A chief engineer changed while the repair was underway. The outgoing engineer mentioned the motor's removal in general terms in his handover notes.

When the overhauled motor returned, the relief engineer reinstalled it. Incorrect electrical connections caused smoke and a small fire. Some positive cabling on that engine model was black, a detail omitted from the handover and overlooked during reconnection.

MAIB highlighted detailed notes, photographs and references to the manufacturer's instructions, alongside the need for the person resuming the work to establish the correct procedure. ^[2]

An unfinished maintenance job requires a precise account of where work stopped. The incoming officer needs to understand what was removed, what remains isolated, what has been checked and what still requires verification.

A job title and a completion percentage leave considerable room for assumptions. Photographs and notes become useful when they explain the actual condition in which the equipment has been left.

The consequences can also cross departmental boundaries.

AMSA investigated a landing barge collision on 16 March 2022 following a last-minute change of engineers. The outgoing engineer failed to tell the incoming engineer that the port main engine's cooling-water suction valve was shut.

The engine overheated after departure. While investigating the problem, the master became distracted from navigation and the vessel struck a channel marker. The investigation identified missing engineering handover procedures alongside the master's loss of navigational attention. ^[3]

The valve's condition mattered to the engineer receiving the ship. Its effect on propulsion also mattered to the person navigating it. Information must reach everyone whose decisions depend on it.

What taking over should establish

These cases point to three distinct subjects for a handover: the equipment's actual configuration, the state of unfinished work and the ship's present operating limitations.

They require different evidence. An approved drawing can explain a modification. A maintenance record can establish what work was completed. A current isolation record can identify equipment unavailable for service. A verbal explanation helps connect those records to the equipment and the operation ahead.

A useful discussion should also expose uncertainty. Record unexplained recurring faults. Where a repair is reported, identify the work and its verification. Where an operating restriction remains, explain its scope to the people affected.

The incoming officer still has to examine the information and verify conditions appropriate to the task. Handover supports that judgement; subsequent work requires its own planning, risk assessment and controls.

Company arrangements have a substantial role here. The ISM Code addresses familiarisation, maintenance records and control of safety-management documentation. Essential instructions before sailing are to be identified, documented and provided. These provisions place the transfer of knowledge within a continuing management system. ^[4]

An effective company process should make relevant records available before joining, direct overlap towards significant risks and give unresolved items a named owner ashore or aboard. When the installed arrangement differs from the records, that discrepancy needs investigation and appropriate control.

The next officer should leave the handover able to explain the ship's current condition, the restrictions affecting its operation and the next action on each significant unresolved item.