Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR
USCG General Navigation (Set 13)
30:00
|Question 1 of 30
Question Navigator
Correct Incorrect Pending Starred
Question 1 of 30
All persons or vessels within the lock area, including the lock approach channels, come under the authority of the __________.
Browse Questions in Set 13
30 MCQs #1 All persons or vessels within the lock area, including the lock approach channels, come under the authority of the __________. #2 You are approaching a multiple-span bridge at night. The main navigational channel span will be indicated by __________. #3 Which item in illustration D034NG below shows a flashing light? #4 You are approaching a swing bridge at night. You will know that the bridge is open for river traffic when __________. #5 Illustration D036NG below represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter D? #6 Illustration D037NG below represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at D if the lock walls and piers are not awash? #7 Illustration D037NG below represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at B if the lock walls and piers are not awash? #8 You are approaching the first of two drawbridges that span a narrow channel. The second drawbridge is close to the first. Which signals should you sound? #9 The draw span of a floating drawbridge may be marked with __________. #10 The white lights in a vertical line on a multiple-span bridge indicate __________. #11 In which publication could you find information concerning the minimum lighting required for bridges on U.S. waters? #12 Restricted areas at locks and dams are indicated by __________. #13 A flashing red light displayed at a single lock means that the lock __________. #14 You are approaching a lock and see a flashing amber light located on the lock wall. You should __________. #15 Which light signal indicates that you have permission to enter a lock on the Ohio River? #16 A flashing green light displayed at a single lock means that the lock is __________. #17 You are approaching a drawbridge and must pass through during a scheduled closure period. What signal should you sound? #18 You are approaching a drawbridge and have sounded the request-for-opening signal. The bridge has responded with five short blasts. How would you respond? #19 When approaching a lock and at a distance of not more than a mile, vessels desiring a single lockage shall sound which signal? #20 Permission to leave the riverward chamber of twin locks is given by the lockmaster and consists of which sound signal? #21 A light that has a light period shorter than its dark period is described as __________. #22 What is characteristic of an isophase light? #23 What is the characteristic of a quick light? #24 What is NOT true concerning color sectors of lights? #25 You are underway and pass by a lighthouse. Its light, which was white since you first sighted it, changes to red. This means __________. #26 A List of Lights entry (L Fl) is a single flashing light which shows a long flash of not less than __________. #27 The period of a lighted aid to navigation refers to the __________. #28 What characteristics can be used to identify a lighthouse? #29 Luminous range is the __________. #30 When a light is first seen on the horizon it will disappear again if the height of eye is immediately lowered several feet. When the eye is raised to its former height the light will again be visible. This process is called __________.
Question Discussion & Notes
0Have a doubt, memory trick, or exam update? Share your insights with fellow mariners.
Loading mariner discussions...