英语翻译

英语翻译
Once were at sea,our routine every day was the same.At sunrise and sunset the captain measured our position using the quadrant and set the course using the compass.It was extremely difficult for us to get a correct reading from the quadrant as the boat moved constantly.The captain used a system called “dead reckoning”.He knew there was land directly northwest of our original position.So his task was to make sure we stayed on that course.As you can see from the map we kept to a straight course pretty well.In addition,the captain kept us all busy reading the tables to work out our position.Although this took a great deal of time,it didn’t matter.Time was,after all,what we had a lot of!