Question 373Navigation General70% to pass
Clearance gauges at bridges indicate _______________.
AI Explanation
The correct answer is D) distance from the water to low steel of the bridge.
Clearance gauges at bridges indicate the vertical clearance, or the distance from the water surface to the lowest point of the bridge structure. This allows vessels to determine if they have enough overhead clearance to safely pass under the bridge. The other answer choices do not accurately reflect the purpose of clearance gauges. Option A refers to water depth, which is not what clearance gauges measure. Option B refers to the charted vertical clearance, not the actual clearance shown on the gauge. Option C refers to the tide height, which may affect the clearance but is not directly indicated by the gauge itself.
Related Questions
#371 You are entering an east coast port and see a buoy with a yellow triangle painted on it. What does the symbol indicate? #372 An alternating light _______________.#374 Buoys and day beacons exhibiting a yellow triangle or square painted on them are used _______________.#375 When a dual purpose marking is used, the mariner following the Intracoastal Waterway should be guided by the _______________.#376 You are sailing south on the Intracoastal Waterway (ICW) when you sight a red nun buoy with a yellow square painted on it. Which of the following is TRUE?