408 TRANSACTIONS OF THE 



it shifts to the left, that is, from north toward west, and so on, you are in 

 the left semicircle. In northern latitudes the right is the dangerous semi- 

 circle, and the left the navigable semicircle, but in southern latitudes the 

 case is reversed, the left becoming the dangerous side and the right the 

 navigable side. The following are general rules for guidance under ordi- 

 nary circumstances: 



In northern latitudes, right semicircle. — Haul by the wind on the starboard 

 tack and carry sail as long as possible ; if obliged to heave-to, do so on the 

 starboard tack. 



Left semicircle. — Bring the wind oh the starboard quarter. Note the 

 direction of the ship's head and steer that course. If obliged to heave-to, 

 do so on the port tack. 



On the storm track, in front of the center. — Square away and run before it. 

 Note the course and keep it; trim the yards when the wind draws on the 

 starboard quarter. If, however, obliged to heave-to, do so on the port tack. 



In rear of the center. — Run out with the wind on the starboard quarter, 

 or heave-to on starboard tack. 



In southern latitudes, right semicircle. — Bring the wind on the port quarter. 

 Note the course and keep it. If obliged to heave-to, do so on starboard 

 tack. 



Left semicircle. — Haul by the wind on the port tack. Carry sail as long 

 as possible, and if obliged to heave-to, do so on port tack. 



In front of the center. — Run before it. Note the course and keep it, and 

 trim the yards as the wind hauls on the port quarter. If obliged to heave-to, 

 do so on starboard tack. 



In rear of center. — Run out with wind on port quarter or heave-to on port 

 tack. 



All of the above maneuvers depend, of course, on the amount of sea 

 room and the ability to carry sail. If sail cannot be carried or land inter- 

 feres, the ship should be hove-to on the starboard tack in the right semi- 

 circle, and on the port tack in the left semicircle, and never otherwise, no 

 matter what may be the latitude. 



The following, compiled from information on file in the Hydrographic 

 Office, is supplementary to what was published in a special bulletin in 

 1888, having reference more particularly to storms in the Northern Hem- 

 isphere: 



