Which rule applies when the vessels meet - and can you document the assessment?

    Combine the collision regulations, the Norwegian and English text side by side, and a clear situation assessment for training and operational decision support.

    Does this sound familiar?

    Crossing courses are read differently

    A wrong assessment of the give-way duty or of a course change creates both operational risk and a weak account of events afterwards.

    The light picture fits several vessel types

    A single observation is not enough; lights, bearing, visibility and movement have to be assessed together.

    The Norwegian rule and the English COLREG text must be read together

    Differences in wording or context can be decisive in training, procedures and documentation.

    A realistic example

    This is a constructed example that shows the format. It is not an assessment of an actual case.

    «Two power-driven vessels are crossing. The other vessel is on our starboard side. Which vessel is to keep out of the way?»

    Extract from the sample analysis

    Preliminary assessment: your own vessel is to keep out of the way and, if the circumstances allow, avoid crossing ahead of the other vessel. The assessment assumes the vessels are in fact in sight of one another and that the situation involves a risk of collision.

    Kilde: Collision regulations rule 15, cf. rule 7

    Dokumentene maritime laster opp

    And what the analysis extracts from each of them.

    Charterparty

    Laytime and demurrage, off-hire, bunkers, trading area, liability for cargo and termination terms.

    Certificates and survey documents

    Issuer, document number, issue and expiry dates, survey window - and whether the date has been confirmed by a person or only read out of a document.

    Port state control report

    Port, date, authority, each deficiency as its own line with the code as the inspector wrote it, and the documentation status per deficiency.

    Vessel particulars

    Name and IMO number with the check digit validated, call sign, MMSI, flag, type, tonnage and class society.

    The collision regulations in parallel text

    Norwegian and English rule text side by side for training and for documenting assessments.

    The checks that trigger most often here

    Vi oppgir ikke hvor ofte hver enkelt feil forekommer — vi har ikke grunnlag for slike tall. Dette er kontrollene analysen faktisk kjører på dokumentene over.

    An undocumented date is never shown as in order

    A date that is missing, or that has not been confirmed by a person, is marked as exactly that. That is the whole point of the overview.

    Deficiencies stay in the inspector's wording

    The deficiency code and the text are stored as they were written, with your planned response alongside. We do not rewrite the finding.

    IMO numbers are validated on entry

    The check digit is calculated every time a number is entered, both in the app and in the database.

    A source base, or an empty state

    If the source base for a question is missing, the product says so and charges no credit - it does not invent a convention reference.

    One clause, reviewed

    Utdraget under er konstruert for å vise formatet. Det er ikke hentet fra en kundes dokument.

    Charterparty, off-hire clause

    "Should the vessel be prevented from full service by reason of a deficiency of crew or equipment, hire shall cease until the vessel is again in full service."

    Dette flagges

    • No threshold for how long the prevention must last before hire stops.
    • "Full service" is not defined - partial operation is unregulated.
    • Nothing regulating bunkers and port expenses during the off-hire period.
    • No documentation requirement for the cause of the prevention.

    The analysis separates what the clause actually regulates from the four questions it leaves open, and suggests wording for each. No convention or regulation reference is used, because the source base has not been loaded.

    NO/EN
    rule text side by side
    1-41
    COLREG rules in the lookup
    Stated
    rule, assumption and reasoning

    Test the question in a live analysis

    The sample question is filled in automatically. You can change the facts before the analysis starts.

    Justera is a decision-support tool that uses AI — not legal advice. Consult a qualified lawyer for binding assessments.