269/ Navigation and Watch Keeping / 992
Na
v
i
g
ation and
W
atc
h
Kee
p
in
g
BOS-
P
RD-2
6
.900
5
02
4
.
3
.
3
R
e
s
t
r
icted
v
i
s
i
b
ilit
y
T
he
W
atc
h Off
ice
r
i
n
char
g
e
of
the
nav
i
g
at
i
ona
l
w
atch
,
add
i
t
i
ona
l
B
r
id
g
e
W
atc
h Off
ice
r
s
and
l
oo
k
outs
shall
not
p
erform
any other
dut
i
es
e
x
ce
p
t nav
i
g
at
i
ona
l
dut
i
es
dur
i
n
g
t
i
mes of
restr
i
cted
v
i
s
i
b
ili
ty
.
I
f
the
v
i
s
i
b
ili
ty deter
i
orates
,
or
the
B
r
id
g
e
W
atc
h Off
ice
r
e
x
p
ects
v
i
s
i
b
ili
ty
to
deter
i
orate
,
he
/
she
shall
:
x
Ca
ll
and
i
nform
the
Ma
s
te
r
;
x
I
nform
the
E
n
g
ine
W
atc
h Off
ice
r
i
n order
to ma
i
nta
i
n En
g
i
ne
R
oom
p
re
p
aredness
;
x
Ensure
ade
q
uate
re
i
nforcement
of
l
oo
k
outs
(i
nc
l
ud
i
n
g
cons
i
derat
i
on
of
p
ost
i
n
g
outs
i
de
l
oo
k
outs
)
and
radar
mon
i
tor
i
n
g
i
nc
l
ud
i
n
g
radar
p
l
ott
i
n
g
and
echo
sound
i
n
g
s
,
and
shall
s
w
i
tch
to
the
manua
l
steer
i
n
g
mode
;
x
Chec
k
and
ad
j
ust
radar
sett
i
n
g
s
,
turn
on
nav
i
g
at
i
ona
l li
g
hts
,
and
chec
k
that
the
horn
/w
h
i
st
l
e
i
s
w
or
ki
n
g p
ro
p
er
l
y
;
x
App
l
y
re
g
u
l
at
i
ons
for
p
revent
i
n
g
co
lli
s
i
ons
at
sea
i
n
a
str
i
ct and
t
i
me
l
y
fash
i
on
(
COLREG
R
u
l
e 1
9);
x
M
a
i
nta
i
n
safe
s
p
eed at a
ll
t
i
mes
i
n
re
l
at
i
on
to
the
p
reva
ili
n
g
v
i
s
i
b
ili
ty
;
x
A
d
j
ust
s
p
eed
su
i
tab
l
y and
i
n
g
ood
t
i
me
;
x
P
ay
s
p
ec
i
a
l
attent
i
on
for
sound
s
i
g
na
l
s
.
D
ur
i
n
g
restr
i
cted
v
i
s
i
b
ili
ty
,
En
g
i
ne
W
atch
K
ee
p
i
n
g
res
p
ons
i
b
ili
t
i
es
are
as
documented
for
coasta
l
nav
i
g
at
i
on
.
4
.
3
.
4 Sh
allow wate
r
“
S
ha
ll
o
w
w
ater
”
should
be cons
i
dered
to
be
any
w
ater
w
here
a
ma
xi
mum
c
l
earance
of
2
meters
or
l
ess
beneath
the
l
o
w
est
p
o
i
nt of
the
vesse
l’
s
under
w
ater
structure
(
usua
ll
y
the
k
ee
l) i
s
p
resent
.
Ma
s
te
r
s
shall
i
nform
the
C
ont
r
act
s
Mana
g
e
r
s
w
henever
any
re
q
u
i
rement
or
re
q
uest
i
s made
by
charterers
to o
p
erate
i
n
areas
of
sha
ll
o
w w
ater
;
the
Ma
s
te
r
shall
a
l
so
i
nform
the a
pp
li
cab
l
e
Op
e
r
ation
s
Mana
g
e
r
.
C
ont
r
act
s
Mana
g
e
r
s
shall
d
i
scuss
the
re
q
u
i
rement
w
i
th
the
a
pp
ro
p
r
i
ate
c
li
ent
re
p
resentat
i
ve
and
should
obta
i
n
a
fu
ll
s
i
te
survey
,
or
e
q
u
i
va
l
ent
,
of
the
sub
j
ect area
,
w
h
i
ch
i
n
turn
shall
be
p
assed
to
the
Ma
s
te
r
.
C
ont
r
act
s
Mana
g
e
r
s
shall
estab
li
sh ma
xi
mum
o
p
erat
i
n
g
drafts
w
i
th
the
a
pp
ro
p
r
i
ate
c
li
ent
re
p
resentat
i
ve
i
n
add
i
t
i
on
to
estab
li
sh
i
n
g
other
cons
i
derat
i
ons
such
as
t
i
da
l
w
i
ndo
w
s
to
g
i
ve
o
p
t
i
mum
U
nder
-K
ee
l
C
l
earances
(
U
K
C
).
W
hen
cons
i
der
i
n
g
the
U
K
C
a
ll
o
w
ances
,
the
fo
ll
o
w
i
n
g
var
i
ab
l
e factors
and
l
oca
l
cond
i
t
i
ons
shall
i
nc
l
ude
,
but
are not
be
li
m
i
ted
to:
x
T
he
s
q
uat effect
;
x
Env
i
ronmenta
l
cond
i
t
i
ons
;
the
p
reva
ili
n
g w
eather
,
he
i
g
ht of
s
w
e
ll,
t
i
da
l
he
i
g
ht
and
ran
g
e
,
atmos
p
her
i
c
p
ressure
,
and
chan
g
es
i
n
the dens
i
ty of
sea
and
i
n
l
and
w
aters
,
etc
.;
x
T
he nature
and
stab
ili
ty of
the bottom
(
e
.
g
.
sand
w
ave
p
henomena
);
x
T
he
vesse
l
's
s
i
ze and
hand
li
n
g
character
i
st
i
cs
,
and
i
ncrease
i
n draft due
to hee
l;
x
T
he
re
li
ab
ili
ty of
sh
i
p
's
draft observat
i
ons
and
ca
l
cu
l
at
i
ons
;
x
T
he accuracy of
hydro
g
ra
p
h
i
c
data and
t
i
da
l
p
red
i
ct
i
ons
;
x
R
educed de
p
ths
over
p
i
p
e
li
nes
.
W
henever
w
or
ki
n
g
i
n
sha
ll
o
w
w
ater
areas
,
the
Ma
s
te
r
shall
use
a
ll
ava
il
ab
l
e
means to
g
ather
data
and
i
nformat
i
on
concern
i
n
g
the
area
from
other
vesse
l
s
a
l
ready
or
p
rev
i
ous
l
y
w
or
ki
n
g
the
area
. S
uch
i
nformat
i
on
i
s
to be
reta
i
ned
onboard
and made ava
il
ab
l
e
for
B
r
id
g
e
W
atc
h Off
ice
r
s
at
w
atch handover
.
T
he
Ma
s
te
r
shall not
o
p
erate
w
i
th
i
n
sha
ll
o
w w
ater
areas
un
l
ess
sat
i
sf
i
ed
by h
i
s
/
her
o
w
n
g
ood
j
ud
g
ement
and
the
p
ract
i
ces
of
g
ood
seamansh
i
p
that
i
t
i
s
safe
to
do
so
;
add
i
t
i
ona
ll
y
the
Ma
s
te
r
shall
:
x
M
a
k
e
fu
ll
cons
i
derat
i
on
for
the
effects
of
s
q
uat
and
p
roceed
at
a m
i
n
i
mum
s
p
eed
su
i
tab
l
e
to ma
i
nta
i
n
such effects
to an abso
l
ute m
i
n
i
mum
;
x
Ensure
that
at
l
east
t
w
o
means
of
p
os
i
t
i
on
f
ixi
n
g
are
used
to
ascerta
i
n
the
vesse
l’
s
p
os
i
t
i
on
.
W
herever
p
oss
i
b
l
e
,
these
shall
i
nc
l
ude
f
ix
es
from
bear
i
n
g
s
ta
k
en
of reco
g
n
i
sed nav
i
g
at
i
on
mar
k
s
,
V
ers
i
on
S
F
(BOS-
P
RD-0
7
.900
5
02-
ver
.0
4
). O
r
i
g
i
na
l
date:
0
1
/
0
6
/
20
1
2.
V
ers
i
on
date:
3
1
/
1
2
/
20
15
.
V
a
li
d
vers
i
on
on
l
y
on Q
M
S
s
i
te
.
U
ncontro
ll
ed
document
w
hen
p
r
i
nted
.
P
rocedure
p
re
p
ared by:
BOS
Head
of
O
p
erat
i
ons
.
App
roved
by:
BOS
Head
of
O
p
erat
i
ons
.
V
a
li
dated by:
BOS
Qua
li
ty
R
e
p
resentat
i
ve
.
7
/
17
269