Under Rule 5, a proper lookout must be maintained by:
Uscg Master 100 Rules Road
Question · Easy
You observe another vessel by compass bearing, and its bearing remains nearly constant while the range is closing. What should you assume?
Question · Medium
Vessel whose work, such as dredging or cable laying, keeps it from getting out of the way as the steering rules require.
Rules of the Road
Guess the Term
Introduction: Master 100 Credential
0.1 About the Master Less Than 100 GRT Credential
Study guide
Which factor is specifically listed in Rule 6 as an additional safe-speed consideration for vessels using radar?
Read the clue and guess the term in 6 tries.
Game
A very large ship shows an appreciable change of bearing, but the vessels are already close. Under Rule 7, what is the safest conclusion?
Question · Hard
Vessel unable to maneuver as required and therefore unable to keep out of the way because of an exceptional circumstance.
When action is taken to avoid collision, Rule 8 says it should be:
In restricted visibility, you detect by radar alone another vessel forward of your beam. Which action does Rule 19 generally say to avoid?
Designated routing measure that keeps opposing streams of ships apart using one-way lanes divided by zones or lines.
0.2 Eligibility, Sea Service & Tonnage Calculations
If there is any doubt whether risk of collision exists, the Rules require you to:
Swap tiles to line up three of the same term.
Term Match
Which watch arrangement best satisfies proper-lookout requirements on a busy night transit?
Rapid signal of about five seconds sounded at intervals of not more than one minute by an anchored vessel shorter than 100 meters.
Why are a succession of small course changes usually poor collision-avoidance practice?
Safe speed is the speed at which a vessel can:
Kind of white light placed as near as practicable to the after end, showing an unbroken 135-degree arc.
0.3 MMC Application: TWIC, Medical, Drug Test, Fees & ASAP
A vessel is considered to be overtaking another when it approaches from:
Flip two cards at a time to find matching terms.
Term Pairs
Two power-driven vessels are meeting nearly head-on. What is the required action?
Vertical distance from a vessel's molded baseline to the waterline.
Deck General
In a crossing situation between two power-driven vessels, which vessel is the give-way vessel?
In a crossing situation, when may the stand-on vessel take action to avoid collision?
Maximum width of a vessel, denoted B in stability calculations.
0.4 ONC06 Exam Format, Modules, Scoring & REC Logistics
When two sailing vessels are approaching one another and each has the wind on a different side, which vessel must keep clear?
Find five hidden terms in a grid of letters.
Term Search
Two sailing vessels are on the same tack. Which vessel must keep clear?
Kind of tonnage that gives a vessel's approximate volume rather than its useful capacity.
A power-driven vessel and a sailing vessel are crossing in clear weather. Which statement is correct?
A power-driven vessel is approaching a vessel engaged in fishing. Which vessel normally keeps out of the way?
Document that must be posted under glass where passengers can see it and all its pages remain visible.
Rules of the Road: Foundation
1.1 COLREGS vs Inland Rules
Once a vessel is determined to be overtaking, when does its obligation to keep clear end?
When vessels are not in sight of one another in restricted visibility, which rule governs their conduct?
Single Coast Guard-issued item that combines the individual document, license, registry certificate and STCW endorsement.
A stand-on vessel in a crossing situation decides action is necessary. Which alteration should it ordinarily avoid, if circumstances allow?
A sailing vessel has the wind on the port side and sees another sailing vessel to windward but cannot determine whether that vessel has wind on the port or starboard side. What must the first vessel do?
Kind of life buoy; a small passenger vessel must fit at least one with a buoyant lifeline at least 18.3 meters (60 feet) long.
Deck Safety
1.2 General Definitions (Rules 1–3)
What is the horizontal arc of visibility of a masthead light?
Which set of lights is normally shown by a power-driven vessel underway at night?
Life ___: flotation device a small passenger vessel must provide in adult size for each person carried, plus child sizes for at least 10% of the persons permitted.
How may a sailing vessel under 20 meters display its sidelights and sternlight?
A vessel less than 50 meters in length at anchor must normally show:
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