422 / 868
N
A
(O"
!heMe of tb<: eourfe
H·, 45'
to the departure
3' .1'
For differeDee of latitude.
v
1
G
9·74474
1'49
2
93
Aa radios
10.0 0000
i.tothediCl.Dee
56
1.74819
foisthe ao·uneofthe eourfe
03°, 45'
9·9 198~
to tbe diff. of latitude - 46.57
-
1.66804
2. Courfe SSE and dill. nce 64 miles.
For doparture.
A.
radiu.
¡.
ro th. dillaDee
64
fo is the fine
of
the courre
22°,
30'
to rhe departare
24 .5
For difference of latitude.
As radias
is to th. dia.nee
-
64
fo is the co·fine of tbe coarre
22°,
30'
to the differeDce of I. titude 59.1 3-
l .
Courfe
NW¡'W
.nd diaanee 48
A.
radiu!
I' or departure.
-¡s
tO the diClanee
48
fg
i. the fine of the eourfe
56·,
lS'
to tbe dep.rture
39.9 1
For différeoee of latitude.
1-0.0000 0
1.806 18
9· S 828 4
1. 38 9°2
10 .0 0000
1.806 18
9·9 6 S 62
1.771 80
miles.
,10.00000
..6812<1
9.Q
19
85
1. 60 1°9
As radius
10.00COO
i.
to rbe diClauee
48
,,681 24
fa is the co·fiDe<lfthe courfe
56°,
IS
9,74474
to rhe dilference of witude 26.67
-
1.4'S98
4.
Cou,fe
5bW
~welhDd
diClance
54
miles.
A. radius
For depanure.
i.
to tbe dillaDee
54
fa
il ,he fine of ,he courfe 16·,
S2'
lo Ihe departure
1
S.67
For diff<Te8Ce
01
luitur.e.
10 .00000
1.7 3
2
39
9'4
6
,62
8.1 9S0
1
As radio.
1<l.00000
i.
to the dillanee
-
54
1.73239
fa i. the eo·/iDe of Ihe eourfe 16· , 52
9.98°9°
to tbe difference of I.,itude
S
1.67
-
1.71 329
5 .
Courfe SE bS -} eaCl and dill.nee 74 mile•.
.A. "di.,.
For departure .
is
'o ,he dillance
74
fa i. the fine of the eou rfe
39°. 22
to ,hedepamtre
-
46.94
-
F or differenee of latitude.
JO.OOOOO
1.
86 9
2
3
9 80228
1.67
1
51
As radius
10.00000
i. to the diClaoee
-
74
1.8°923
fa i. the co·fine
01
the eourfe 39°, .,'
9.88824
to the difference of latitude 57.21
1.
757 47
N ow thefe feveral courfes and diflances, together
Wilh
the dilferences of I. ,ilude and departo res dedueed from
1hem, bein.g Cet down in theír proper calumos in (he
traverrc
table,
wiJl
fiand
as
0 0
next coJumD.
A
T
o
N,
371
__
~
__
~
__
~~1'~h_e_1'
__
~_A=v_. ~ .~~1'~A_~_L7E~.~
__
~~
__
.C.u;!«
Dijlancu D iff.
o{
Lat.
¡
D <parTl<re
'---:;V'--SI-E-¡
W
SEbS
~
SSE
NWbW
SbW-}Wea
SEbS-}E.I!
S 6 ==1~1-;::
64---
S9·
t
3 . 24' S
48 26.67 ------ 39.9 t
54---1)1 .67 -- 15. 67
94 ==,~~1~~
___
I
26.67 ¡1214'S8!102 ' 55
SS ·58
26 67 1 55 'S 8
D iff·
of
Lat.
1~;1~7
/'lepo
1-. II'O""2-4--h-o-u-,,- ,-.
-c-oofeq"~IIt1y,-;-o
find
t¡"~
true eou rfe
;;;;<1
diClance made good by the Ihip in that time, it will be,
(by
Cofo
4.
of
P I"in Sailing ,)
.
.As the dilfereoce
of
la,itude
18 7.91 2.273 93
is to radius-
10 .0 0000
fa is the departure
,,6,97 1.671 S2
to the tan¡:enr oflhe tourf"
14°,°3 -
9.39789
whieh i,
SbE"'e~rt
DelYrly. 1'heo for the diClance, it will be,
As
radi..
10.00000
is ",
lbe difference oflatitude
187.9 1
2.21393
fa i. rlIe fecant of ,he eourfe
' 4
0 ,
03'
10 .013 19
tothe diClance
193 .7
2.287 12
eonfequently the /hip has made· good Ihe laa 24 hours,
on a SbE
t
eaCl eourfe, 193,7 miles: And fi nee tbe Ihip
ís Cailing .towards
lhe
equator; therefore,
From the latitude failed from
48°,
24'
N
take the dilf. of latitude made good
3 , 08
S
there rcm.ins
4S
,
16
N
th
e
latitude the /hip i. in nonh. And becaufe l)le por.
, he /hip is bound for lies in ,he latiludeof 43· 40' oorth,
and eonfequently fou th of the /hip; therefote,
From the latilude the fhip is in
45° , J6' N
rake the lati,ude /he is bound for
43
, 40
N
and
lhere remains
1 ,
36
or 96 miles, the di!!'erence of latitude or fouthing the /hip
h•• to make. Again, the whole eaCling rhe Olip haq tO
make being 144 miles, and /he having already
m.de46.97 or 47 miles gf <aCling; Iherefore.the departure or
eaning Ibe {hJl has to make wiU be 97 mil<s: conrequently,
to
fiod
the direll courCe and difiance
between lhe fhi p
and ,he intended port, it will be (by
C"fo
4.
of
Plain
Sai/ing)
As the dilfercoee of latitude
is
tO
r::.diu$
fo is the departure
tO
the tangent
of
the courCe
ADd
10 .0 0000
97
1.986 77
4S · ,
19' 10.00450
As radius
I o.aocce
i, tO tbe di!!'e"nce of I.titude 96
t .98227
foisthefec.n t oflhecourCe 45 ° , ] 9'
10 . 15 2
9 3
to ,I'e diClance
-
136.S -
2.13620
"~o
¡ce the (l ue bearing
aod diLlance
oC
lhe
intcnded
poa
1
~6. S
miles.
From
that table
it
is plain, fince the
fum of
the nonhings
is 26.67, and of the foutb ings 214.\8, the d¡!ference be–
tween
thefe,.viz.
187.9 t. will be Ihe fouth ing mode good by
tIle /hipthe 1.11 24hours; alfo the fu mof the ealbngs ueing
102 ·H. and ofthe weClings H .S8, the dlfferen .< 46 97
"'ill be the e.(ling or departure made good by the /hlp"
·V OL .
111. N· 84'
2
t
S
A