Deficiencies in the categories of Life-saving, Safety in General, Fire-fighting Appliances and Load Line （） approximately 66% of all deficiencies.
How many categories are there in water transport?（）
Which of the following are data layer categories to be displayed on ECDIS（）．
Which message categories cannot be disabled by the GMDSS radio operator（）.
Among the basic categories of equipment, which of the following are used to convert mechanical into hydraulic energy?（）
Among the basic categories of equipment, which of the following is used to convert hydraulic energy into continuous rotary motion?（）
Among the basic categories of equipment, which of the following are used to convert the hydraulic energy into linear motion?（）
Among the basic categories of equipment, which of the following are used to allow the hydraulic energy to be controlled?（）
Which categories of NAVTEX messages may not be selectively rejected through receiver programming?（）
Among the basic categories of equipment, which of the following are used to convert the hydraulic energy into linear motion?（）
