WHITE ROCK PEOSSER ROCK. 603 



White rock, 400 yards westwaicl of Xorth head and -10 yards oil' 

 the cliff under Signal hill, has 7 feet of Avater over it. 



Chain rock. — Chain Koek battery bears 276°, distant 850 yards 

 from North head, and Chain rock, which almost covers at high water 

 springs, bears 174°, distant 40 yards from the batter3^ Ruby rock, 

 bearing 217°, distant 40 yards from Chain rock, has ^3 fathoms of 

 water over it. 



Buoy. — A red spar buoy, moored in o^ fathoms, marks Ruby rock. 



Seal rock, bearing 297', distant about 120 yards from Chain Rock 

 battery, covers at three-quarters flood. South head, well open of 

 Chain Rock battery, bearing 117°. leads southward of it. 



Light. — South head. — A white square lighthouse with a red roof, 

 surmounted by a lantern, 39 feet high, at fort Amherst, about 125 

 yards west-southwestAvard of South he:id, exhibits at 134 feet above 

 high water a fixed white light that should be seen over an arc of 

 135° to seaward, between the bearings 217° and 352°, from a distance 

 of 12 miles in clear weather. 



Fog" signal. — A diaphone fog signal, operated by compressed air, 

 sounds blasts of three and one-half geconds' duration, separated by 

 silent interA'als of sixty-six seconds, during thick and foggy Aveather. 



The horn projects through the southeastern side of a white building 

 with a flat roof, erected on the seaward side of the lightkeeper's 

 dwelling. 



Vestal rock, bearing 111°, distant nearly 100 yards from South 

 head, has 12 feet of water over it. The Roman Catholic cathedral 

 open northward of the land on the southern side of the entrance or 

 Frederick battery well open northward of South head, bearing 278°, 

 leads northward of the rock. 



Pancake rock, bearing 285°. distant 700 yards from South head 

 and about 40 yards off the southern shore of the channel, is awash at 

 high water, and a spur, with 12 feet of water over it, extends north- 

 eastwai'd about 40 yards from the rock. 



Buoy. — A black spar buoy is moored in 3 fathoms close northward 

 of Pancake rock. 



Little Pancake rock, bearing 282°, distant about 90 yards from 

 Pancake rock, has feet of water over it, and there is a depth of 6 

 feet at 50 yards northwestward of this rock. 



Prosser rock, or Cahil rock, bearing 282°. distant about 275 yards 

 from Pancake rock and 4°, distant 40 yards from the fishing stage at 

 Cahil point, has 5 feet of water over it. South head, open northeast- 

 ward of Frederick battery point, bearing 106°, leads northward of 

 the rock. 



Buoy. — A white spar buoy is moored in 3 fathoms close northward 

 of Prosser rock. 



Note. — The buoys may be removed without notice when ice is on the coast. 



