EXAMINATION
VESSEL FLAG

(2)

PORT
CLOSED

O

o
o

PORT
OPEN

O

EXN. VESSEL
HEAD ON

MINE SWEEPERS

(7)

NAVIGATING
STERN FOREMOST

(6)

O

o o

SEINE NET

(9)

O

PRATIQUE
NOT RECEIVED

(10)

o
o

LIGHT VESSEL OUT OF POSITION
FIG. 3

TUO AND
HER TOW