What the examiner is probing
This outcome tests whether you, as Master, understand your obligations when encountering ice — not just seamanship instincts. The examiner wants to see that you know the legal duty to report, what a report must contain, who receives it, and that you understand ice accretion as a stability and structural threat requiring active command decisions. A pass answer links regulation to action; a fail answer gives vague seamanship without the command framework.
Ice reporting — the legal duty
SOLAS V/31 places the duty on the Master to report, by all available means, any dangerous ice encountered. This is not discretionary. The report must be made to ships in the vicinity and to the nearest coast radio station or Rescue Coordination Centre.
SOLAS V/32 extends the obligation: Masters must also report severe ice accretion on superstructure, and sub-freezing air temperatures combined with gale-force winds that produce dangerous icing conditions. Both regulations are examinable and sit together as the framework governing ice danger reports.
A standard ice observation report should contain:
- Type of ice — iceberg, growler, bergy bit, field ice, fast ice, etc.
- Position (lat/long)
- Time and date of observation (UTC)
- Extent or quantity as observed
In practice, WMO/SOLAS ice observation formats are promulgated by hydrographic offices and coast guard authorities. The IAMSAR Vol III and national weather broadcast procedures cover how and where to transmit. Routine reports feed into NAVAREA warnings and, in North Atlantic waters, the International Ice Patrol.
Ice accretion — the command threat
Ice accretion is the build-up of ice on exposed structure from freezing spray, freezing rain, or supercooled fog. It is an acute stability hazard because:
- Mass accumulates high up — superstructure, masts, rigging, rails — raising the centre of gravity (KG) and directly reducing the righting lever (GZ) at all angles of heel.
- It develops rapidly; significant accumulation can occur within hours in Arctic or sub-Arctic conditions.
- It may be uneven, introducing a list that compounds the reduction in stability.
As Master your response is proactive, not reactive:
- Monitor air and sea temperature and wind speed — accretion accelerates in strong winds and temperatures well below freezing.
- Alter course or speed to reduce spray generation before accretion becomes critical.
- Deploy crew to remove ice from high structure continuously — chipping, steam, hot water.
- Reassess stability as conditions develop; if in doubt, seek shelter or alter route.
- Reduce speed to minimise additional spray and dynamic loads.
Stability booklets for vessels operating in ice regions should contain guidance on accretion allowances. For a vessel not certified for polar or ice-class service, operating in conditions producing accretion may itself constitute operating outside the vessel's safe operating limits.
How to structure your spoken answer
Open by stating the obligation: "Under SOLAS V/31 and V/32, as Master I have a duty to report any dangerous ice, severe ice accretion, and dangerous icing conditions to ships in the vicinity and to the nearest coast station." Then give the report contents — type, position, time, extent. Then shift to accretion: identify it as a stability threat, explain the mechanism — high-sided accumulation raises KG and reduces GZ — and describe your command decisions in priority order. Close by connecting both elements: "Both obligations sit with me as Master — the reporting duty under V/31 and V/32 and the stability management through my SMS procedures and seamanship judgement."