Marine Authority

Compass Adjustor's Declaration

Table of Deviations of the Standard Compass

Ship's Head by Standard Compass		Deviation	....................	Ship's Head by Standard Compass		Deviation	....................
000^o	North	2½^oE		180^o	South	2½^oE
010^o	N10^oE	2^oE		190^o	S10^oW	2^oE
020^o	N20^oE	1^oE		200^o	S20^oW	2^oE
030^o	N30^oE	½^oE		210^o	S30^oW	1^oE
040^o	N40^oE	0		220^o	S40^oW	1^oE
050^o	N50^oE	0		230^o	S50^oW	0
060^o	N60^oE	½^oW		240^o	S60^oW	0
070^o	N70^oE	1^oW		250^o	S70^oW	1^oW
080^o	N80^oE	2^oW		260^o	S80^oW	1^oW
090^o	East	2½^oW		270^o	West	2^oW
100^o	S80^oE	2^oW		280^o	N80^oW	2^oW
110^o	S70^oE	1^oW		290^o	N70^oW	1^oW
120^o	S60^oE	½^oW		300^o	N60^oW	1^oW
130^o	S50^oE	0		310^o	N50^oW	0
140^o	S40^oE	0		320^o	N40^oW	1^oE
150^o	S30^oE	½^oE		330^o	N30^oW	1^oE
160^o	S20^oE	1^oE		340^o	N20^oW	2^oE
170^o	S10^oE	2^oE		350^o	N10^oW	2^oE

Plan	Description of correctors			No. and size of correctors	Distance from centre of corrector to centre of compass needles
	Fore and Aft magnets		Port

			Starboard
	Athwartship magnets
	Flinders bar	Foward	of Compass	Length Diameter

		Abaft
	Quadrantal correctors			Diameter
	Vertical magnets Red end		Up		Distance from upper ends of magnets to centre of compass needles

			Down
Changes since last compensation
The deviations were obtained by means of distant bearing and a copy of the above table has been furnished to the Master. Type of vertical force Instrument used I hereby declare that the compasses of the above named vessel have this day been examined and adjusted by me and that they are in good order.
Dated at the day of 20 Adjuster of Compasses