Should always correct determination of the rate-of-way, in order to take advantage of projected Cheng-speed vesselposition, the Log will show the correct speed for the actual speed of the ship.
应经常测定计程仪改正率，以便利用计程仪航速推算船位时，将计程仪显示的航速改正为船舶实际航速。
2
They plotted the new position of each vessel.
他们标明每艘船的新位置。
3
Design pressure shall mean the gauge pressure at the top of a completed vessel in its operating position.