46 MANUAL OF CURRENT OBSERVATIONS 
columns in the record book. In the event that other duties have prevented taking 
the observation on the exact hour, the observation may be taken as soon thereafter 
as practicable, but the time in the record book must be changed accordingly. Thus, 
if an observation is taken 10 minutes past 2, the corresponding hour in the first column 
of the record book should be changed to read “2:10.” 
120. Observing direction—Immediately after the velocity has been recorded, 
stretch the log line across the center of the pelorus and read the graduation where the 
line intersects the forward half of the disk, that is between 270° and 360° or between 
0° and 90°. This reading is to be taken to the nearest 5° and entered in the record 
book in the column provided for the purpose. The ship’s head by standard compass 
must then be immediately recorded in the book. Attention is called to the fact that 
the pelorus reading is to be taken from the forward half of the disk regardless of whether 
the pole has been carried astern of the vessel or has drifted forward of the beam. In 
the latter case the note “Pole forward” must be inserted in the column of remarks. 
If the pole has drifted so close to the side of the vessel that a pelorus reading is impossible 
this should be noted in the record. 
121. Additional information.—The direction from which the wind is blowing as 
determined by the ship’s compass and its velocity in miles per hour are to be recorded 
each hour. The velocity of the wind may be estimated if there is no instrument avail- 
able for a direct measurement. The scale given in paragraph 112 will be found helpful 
in making such an estimate. Any unusual condition of the sea or any other fact that 
may be of assistance in understanding the record should be recorded in the column of 
remarks. In the last column the observer should sign his name. 
