COMPASS IN IRON ARMOUR-PLATED, IRON, AND COMPOSITE SHIPS. 631 
Table I.—Values of the Constant Parameters P and c, Q and f at Standard 
Compass Positions in Her Majesty’s Ships (continued). 
Geographical 
Date of 
Original 
Corrected 
c 
v tan 0 
Original 
Corrected 
position. 
observation. 
P. 
P. 
A 
in England. 
Q. 
Q. 
/ 
^tan 9 
/• 
in England, 
Composite vessels (continued). 
Boxer.*—B uilt S. 60° W. Distance of standard from stern 304 feet. 
Greenhithe . 
30 
xi. 
68 
+ •124 
-•004 
+ •062 1 
+ •023 
-•150 
-•022 
Rio de Janeiro . 
20 
ii. 
69 
-•016 
+ 3° 35'/ 
.. 
-105 
Esquimault, V an- 
couver’s Island 
5 
X. 
69 
-•008 
-•049 
Komax, Vancou¬ 
ver’s Island 
24 
iv. 
71 
-•029 
-•058 
Esquimault . 
30 
xii. 
74 
-•004 
-•030 
Coquimbo. . 
13 
V. 
75 
— •004 
-•003 
Pert.*— Built S. 65° W. Distance of standard from stern 29| feet. 
Devonport . . 
3 ii. 70 
+ •170 
+ •070 4 
+ ■026 
-•174 
55 
Elephant Bay, W. 
8 ii. 70 
•• 
-•056 
+ 4° 0' / 
-•016 
C. Africa . . 
29 xii. 70 
-■056 
-•051 
Rio de Janeiro . 
29 xii. 71 
-•043 
-•054 
Firefly.*— Built N. 26° E. Distance of standard from stern 15f feet. 
Plymouth . 
Simon’s Bay, C. 
24 vi. 79 
-•332 
+ ■004 
+ •012 j 
+ •005 
+ •015 
— r 
Good Hope . . 
Gaboon River, 
29 v. 80 
+ •004 
+ 0° 42'j 
+ •001 
W. C. Africa . 
30 viii. 80 
+ •032 
+ •046 
Wrangler.* —Built N. 45° E. Distance of standard from stern 15f feet. 
Plymouth 
26 v. 81 
— T83 
-•017 
+ •006 4 
+ •002 
+ •323 
+ •004 
Simon’s Bay, C. 
Good Hope. . 
31 xii. 81 
-•017 
+ 0° 20'J 
... 
+ •027 
Wooden corvettes with iron beams and iron vertical bulkheads from keel to lower 
Encounter.— Built S. 76° E. Distance of standard from stern 48 feet. Masts wooden. 
deck. 
Sheerness . . . 
2 ix. 73 
+ ■182 
+ •046 j 
+ •018 
+ ■148 
... 
Simon’s Bay, C. 
9 ix. 73 
+ •016 
+ 
LO ii 
° 1 
i^ 
o 
+ •034 
Good Hope . 
11 iv. 74 
+ •002 
+ •022 
55 
15 x. 74 
-•002 
+ •007 
55 
Grenada . . . 
20 i. 76 
-•048 
-•001 
30 x. 76 
-•048 
-•014 
Sapphtre.— 
-Built East. 
Distance of standard from stern 47f feet, from iron mast 54 feet. 
Plymouth . . . 
21 viii. 75 
+ •202 
+ ■117 j 
+ •045 
+ •115 
55 ... 
24 viii. 75 
-•093 
+ 6° 45'/ 
+ -012 
Simon’s Bay, C. 
Good Hope . 
30 xi. 75 
-•093 
. . 
+ ■013 
Wellington, N.Z. 
xii. 76 
— •107 
+ •001 
Sydney, N.S.W. 
viii. 77 
-•152 
-033 
* These vessels have wooden masts. 
4 m 2 
