BOTH INTERNATIONAL & INLAND Which vessels...

🔍 Key Concepts

• Navigation Rules – Lights and Shapes (Part C), especially rules on when sidelights may be shown or must be extinguished • The specific definitions of vessel not under command, vessel engaged in fishing, and sailing vessel in the Navigation Rules • When a vessel is making way versus simply underway but not making way and how that affects required running lights

💭 Think About

• For each choice, ask: does this vessel type ever show normal running lights (masthead, sidelights, sternlight), and if so, under what conditions might some be turned off? • Think about which special-status vessel must display distinctive red lights that would be confused or hidden if normal sidelights stayed on • Consider whether being becalmed or not making way automatically changes the light requirements, or if the vessel is still treated the same as underway for lights

✅ Before You Answer

• Check in the Lights and Shapes rules which category of vessel is explicitly told to not exhibit sidelights in order to avoid confusing their special lights • Verify the difference between a vessel not under command and a vessel engaged in fishing – which one has a rule about sidelights being shown only when making way, and which one may need sidelights off entirely • Confirm whether a sailing vessel becalmed has any special exemption in the Rules for sidelights (look carefully – don’t assume)

BOTH INTERNATIONAL & INLAND Which vessels shall turn off their sidelights?

All vessels engaged in underwater operations

All sailing vessels which are becalmed

All vessels that are not under command

All fishing vessels that are not making way

🔍 Key Concepts

💭 Think About

✅ Before You Answer