Rule 2 establishes that compliance with the COLREGs does not relieve a vessel of responsibility. The ordinary practice of seamanship and the special circumstances of each case must always be considered.
STCW Bridge Watch Lens
Decide applicability before manoeuvring: Rules 4-10 apply in any visibility, Rules 11-18 only when vessels are in sight, and Rule 19 governs radar-only encounters in restricted visibility.
Build the traffic picture with sight, hearing, radar/ARPA and chart context.
Do not let AIS or one isolated bearing replace systematic observation.
After manoeuvring, keep monitoring bearing, range, CPA/TCPA and passing distance until the other vessel is finally past and clear.
Exam Focus
Start every scenario by classifying the encounter: overtaking, head-on, crossing, narrow channel, traffic separation, or restricted visibility.
If two rules seem to conflict, check the order carefully: overtaking duties still apply, and Rule 2 still requires ordinary seamanship.
Kernpunten
COLREGs compliance alone does not exempt from responsibility
Good seamanship may require actions beyond the rules
Departure from rules is permitted to avoid immediate danger
Special circumstances must always be considered
Veelgemaakte fouten
Blindly following rules without considering the specific situation
Failing to take additional precautions required by good seamanship
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