BOTH INTERNATIONAL & INLAND What is the...

Question 1 / 2707066636eeb28f7522a1c51bb05

Question 1 of 2707066636eeb28f7522a1c51bb05

BOTH INTERNATIONAL & INLAND What is the minimum length of a power-driven vessel that must show forward and after masthead lights?

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Question 1 of 27070

BOTH INTERNATIONAL & INLAND What is the minimum length of a power-driven vessel that must show forward and after masthead lights?

🔍 Key Concepts

• Navigation Rules (COLREGS) – Rule 23: Power‑driven vessels underway • The difference between a single masthead light and two masthead lights in a line • Length thresholds in the Rules where additional lights become mandatory

💭 Think About

• Think about what extra lights a longer power‑driven vessel must show compared with a small powerboat at night. • Recall at what vessel length the Rules first require two masthead lights (forward and aft/higher) instead of just one. • Visualize a large ship at night: bow, stern, and masthead lights – at what approximate size does that configuration become mandatory by rule, not just custom?

✅ Before You Answer

• Check the exact length in meters in Rule 23 where a second (after) masthead light becomes compulsory. • Confirm that the requirement applies to power‑driven vessels underway, not restricted to a specific service or area. • Make sure you are not confusing this length threshold with other length cutoffs (e.g., for towing vessels or vessels required to carry a second masthead light when towing).

Question 1 of 27070

BOTH INTERNATIONAL & INLAND What is the minimum length of a power-driven vessel that must show forward and after masthead lights?

30 meters

50 meters

75 meters

100 meters