相关题目
74. Many of the soundings shown on the chart are derived from (). Undue reliance should not be placed upon them.
73. The shoreline on charts generally represents the mean ().
72. Contour elevations on this chart refer to heights in meters above mean ().
71. *Which one of the following symbols indicates the anchorage area for deep -draught vessels?
70. *Currently on Admiralty charts the criteria for new dangers of wreck means the depth of water above it is ().
69. *Chart 5011 provides () used on Admiralty Paper Charts.
68. Symbols and Abbreviations used on Admiralty charts are contained in ().
67. *Since most charts are not yet referred to WGS84 Datum, positions obtained from satellite navigation receivers ().
66. *Generally, () are used as the track charts on the high sea, () are used for harbors, inland waters and coastal areas.
65. Large scale charts are also called () and are used when approaching the harbours and jetties.
