INLAND ONLY A flashing blue light is used to...

Question 1 / 2707066636eeb28f7522a1c51b8bf

Question 1 of 2707066636eeb28f7522a1c51b8bf

INLAND ONLY A flashing blue light is used to identify which of the following vessels?

Question 1 of 27070

INLAND ONLY A flashing blue light is used to identify which of the following vessels?

🔍 Key Concepts

• INLAND Rules vs. International Rules – some light signals are unique to INLAND waters • Special identification lights for law enforcement and other government vessels • Difference between blue flashing lights and other special lights (yellow, amber, etc.)

💭 Think About

• Which type of vessel would logically need to be instantly recognizable as an authority that can direct other traffic? • Think about where you might also see a flashing blue light on land and what role those vehicles usually have. • Do dredges, air-cushion vessels, or submarines already have other specific light/shape requirements under the rules, separate from a blue flashing light?

✅ Before You Answer

• Verify in the INLAND Navigation Rules – Annex or definitions that describe special identification lights. • Confirm which vessels use blue versus yellow or amber flashing lights. • Check whether dredges, air-cushion vessels, and submarines are identified by other prescribed signals (lights/shapes) rather than a blue flashing light.

Question 1 of 27070

INLAND ONLY A flashing blue light is used to identify which of the following vessels?

dredge pipelines on trestles

air-cushion vessels in the non-displacement mode

law enforcement vessels

U.S. submarines