The following text may have been generated by Optical Character Recognition, with varying degrees of accuracy. Reader beware!

July, 1921 winds are often found at some distance from the center. The central patch "bull's almost tropical but seldom, occurs out of the tropics. appear to be due to the increased tensity of rotation, and as this sity falls off, the "eye" disappears. As the storms of greatest intensity are usually of comparatively small area slow rates of. progression it follows that could we have definite and early information of their position and prospective paths it would be an easy matter to avoid the locality of greatest severity. ; This, however, is not clearly possible. "Even with the advantage of many. si- multaneous observations at stations some distance apart, such .as can be ob- tained on land by a regularly organized service, it is impossible to foretell with certainty the path of the approaching storm. The isolated observer on board ship then can do no more than exercise a of blue sky, universal in if ever, It would or eye," is storms, in- inten- with wise discretion and act according to his best judgment, being guided by such observations as he has at hand. Handling Ships Within Storm Area lf from the weather indications given above and such others as his experience has taught him the navigator is led 10 believe in the approach of a ae he, should at once-- First--Determine the bearing of the center, Second---Estimate its distance. Third---Plot its apparent path. The first two of the above determina- 'tions will locate the approximate posi- tion of the center, which should be marked on the chart. The relation be- tween the position ef the ship and the position and prospective track of the 'center will indicate the proper course to 'pursue. Should the ship be to the westward of the storm center it may be assumed that the latter will draw nearer more 'or less directly. It then becomes of the utmost importance to determine its path and so learn whether the vessel is in the right or left semicircle of the storm area. The right and left semicircles lie 'on the right and left hands, respec- tively, of an observer standing on the storm track and facing in the direction the center is moving. Owing to the 'difference in the direction of rotation 'of storms north and south of the equator that semicircle which lies be- tween the path and the equator in both the northern and the southern hemispheres prior to the storms re- curving (the left-hand semicircle in the northern hemisphere and the right- hand in the southern) is not so liable ' deed never be the case MARINE REViEnWw to the severest t winds; and, when in if, it is easier to avoid. the storm center. For this reason it is called the navigable semicircle, the right semi- circle (left in south latitudes) on the other hand is called the dangerous semi- circle. In order to determine the path of a storm and consequently in which semi- circle the ship finds herself, it is necessary tc wait until the wind shifts. 309 the course and distance has traveled in the interim. 'Two bearings of the center an interval between of from two to three hours, will, in general, be suf- ficient to determine the course of the storm, provided an accurate account is kept of the ship's way, but if the storm be moving slowly a longer in- fiat will be necessary. Should the wind not shift, but continue she with IN HIGH LATITUDE: Velocity along track. 20 to 30 miles per hour: : e Nesta" OD eee teen ee eee Seer efoamsire be N iow LATITUDES Velocity along track, . » © about 17 miles per hour 80° TYPICAL STORM PATH When this occurs, plot a new position of the center iG points to the right of the new direction of the wind as before, and the line joining these two positions will be the probable path of the storm. If the ship has not been stationary during the time between the two sets: of observations (as will in- unless at anchor), allowance must be made for IN MIDDLE LATITUDES STORM RECURVING Velocity along track, 5 to'l0 miles perhour - 70° ON NORTH ATLANTIC to blow steadily with increasing force, and with a falling barometer, it may be assuined that the vessel is on or near the storm track. Owing to the slow advance of storms in the tropics a vessel might come within the dis- turbed area through overtaking the center. Jn such a case a slight de- crease in speed would probably be all that would be necessaty, but it should