Question 466Navigation General70% to pass
The datum used for soundings on charts of the East Coast of the United States is _______________.
AI Explanation
The correct answer is A) mean lower low water.
The datum used for soundings on charts of the East Coast of the United States is mean lower low water (MLLW). This is the standard vertical datum used for nautical charts in the United States, as it represents the average of the lower of the two daily low tides. This ensures that the charted depths are conservative and that vessels will have sufficient clearance over the seafloor at all times.
The other options, mean low water (MLW), mean low water springs (MLWS), and half tide level, are not the standard vertical datum used for US East Coast nautical charts.
Related Questions
#464 The Light List shows a lighted aid to navigation on the right bank. This means that the light can be seen on the starboard side of a vessel _______________.#465 All aids to navigation listed in the Mississippi River System Light List are shown as miles from a reference point and on the _______________.#467 When utilizing a Pacific Coast chart, the reference plane of soundings is _______________.#468 Mean lower low water is the reference plane used for _______________.#469 Mean high water is the reference datum used to measure _______________.