Charting Tools

Measurement, plotting and labeling work on navigational charts for selecting ship routes and recording tracks. Includes nautical triangles, minute gauges, parallel rulers, etc.

On the navigational charts, the work of measuring, calculating and labeling is carried out for the purpose of selecting the ship's route and recording the trajectory. Chart operation according to the order and nature of the operation, is divided into the selection and marking of the planned route of the advance chart operation, the voyage in the accurate implementation of the navigation plan of the navigational chart operation, the combat chart operation of the enemy and our trajectory marking and, if necessary, to analyze the summary of the chart operation. Regular chart work during navigation is an important means to ensure safe navigation according to plan. Since the ship anchored (unhooked) to the anchor (mooring) stop, must be in the prescribed style of continuous and clear navigation chart operation. The content includes: seeking the wind and current pressure in the pre-correction of the course and track plotting, according to the provisions of the timely projection and actual measurement of the ship's position; calculate, measure and analyze with the guarantee of safe navigation according to the plan of the relevant data and factors. Combat charting operations include: determining the elements of enemy ship movements, plotting ship maneuvers, plotting the tracks of enemy ships and their own ships, and marking the bearings and times of the use of weapons. Navigational watch officers and navigational officers are required to carry out the charting operation in a serious and meticulous manner, and the captain of the ship (boat) is required to supervise and check the operation frequently. The chart work of the current voyage must be retained until the beginning of the next voyage before it is erased. In case of maritime affairs, the charts of the operation shall be sealed for maritime investigation. With the development of electronic charts and automatic track display and marking systems, chart operations will be gradually automated.