ABBREVIATION

HARBOR SIZE  
L -LARGE
M -MEDIUM
S -SMALL
V -VERY SMALL
HARBOR TYPE  
CB -COASTAL BREAKWATER
CN -COASTAL NATURAL
CT -COASTAL TIDE GATE
LC -LAKE OR CANAL
OR -OPEN ROADSTEAD
RB -RIVER BASIN
RN -RIVER NATURAL
RT -RIVER TIDE GATE
TH -TYPHOON HARBOR

SHELTER AFFORDED  
E -EXCELLENT
F -FAIR
G -GOOD
N -NONE
P -POOR

MAX SIZE VESSEL  
L -OVER 500' LENGTH
M -UP TO 500' LENGTH

REPAIRS  
A -MAJOR
B -MODERATE
C -LIMITED
D -EMERGENCY ONLY
N -NONE

DRY DOCK AND MARINE RAILWAY CODES  
L -LARGE
M -MEDIUM
S -SMALL

DEPTH CODES
  Feet  
A 76-OVER B 71-75 C 66-70 D 61-65
E 56-60 F 51-55 G 46-50 H 41-45
J 36-40 K 31-35 L 26-30 M 21-25
N 16-20 O 11-15 P 6-10 Q 0-5
Meters
A 23.2-OVER B 21.6-22.9 C 20.1-21.3 D 18.6-19.8
E 17.1-18.2 F 15.5-16.8 G 14.0-15.2 H 12.5-13.7
J 11.0-12.2 K 9.4-10.7 L 7.9-9.1 M 6.4-7.6
N 4.9-6.1 O 3.4-4.6 P 1.8-3.0 Q 0-1.5