> • • * I • • • |T» • • • • • • * • • • 
No. 471 a PRICE 25 CENTS 
Pi-ATE No.2870 
Electrotype Copy No. 1 C.&G.S 
TORTUGAS HARBOR 
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TORTUGAS HARBOR 
IS 3i 
12 
12 
16 
15 
14 
AND APPROACHES 
) *- •- ’* . 0 ^/' ,fl 
Scale 4oooo 
15 | 15 16 
15 The plaae of reference is mean. Lrvr water 
iviciUl uluc OTirxgxr*\vater-afcbT moons mendian passage.. 
Mean time of Iotv water after moons meridian passage. 
Mean height of high, water above, plane of reference. 
Ft. Jefferson. 
9”“ * 44’ 
1) X 1 7 ^XfiXtfVs d j fki lW 1 
'd ? 
The predicted, time cmd height of the tide C can be obtained from the TIDE 
TABLES published annually by the Coast and Geodetic Survey. 
SIGNS AND ABBREVIATIONS 
$. sand. Sh . shells, St- stones, Co. cored.,wh. white, hrd. hard,, sit. soft. crs. coarse, brk. broken, 
the. fine, rky. rocky. 
C. can , N. nun, S. spar. 
| Red buoy, to be left- to starboard in entering. 
| Black burry, to be left to port in entering. 
\ Black and red horizontal stripes, danger buoy. 
\ Black and white perpendicular stripes channel buoy. 
* Bock awash at low water. 
+ Sunken rock. 
f Wreck. 
TricuigulaJCion. executed . in 187 5 
Topography .. in 1875 
Hydrography * . between 1868and 1901 
Garden Key Channel from surveys Try US.Navy to Oct., 190b 
F. signifies laced, V\g.Flasfung ; FI .Hash; FIs .Flashes, Rev. Revolving, W. White, R.Red, v. varied by. Sec. Sector. 
Statute Miles 
B "“ e 
latuude 
LongrEud e TVe st 
lrom. Greerrwicli 
Clxaracter 
1 Interval 
bet. Hashes 
Color of 
structure 
Height 
t^enbility iu 
riant miles at 
16 ft. devatian 
Pog 
s ign ale 
DryTortu* t isfLoggerheadKey 
Tortugas i’iarbor(Gaxden Key] 
24 : 37:' 59" 
24 37 41 
82° 55' 13’ 
32 52 20 
Flg.W. 
rig.w. 
0 J, ‘ 20 s 
| 0 02 
Jlaok&Wliite 
Brown 
1505 it. 
67 •• 
18 2 
14 
Nau tical Miles 
Note. One kilometer orlOOO me crs = 3280.83 ft.=~kof a statute mile nearly. One statute mile =1609.36 meters- 
9 94 12 
ast Dohm 
/5~ ljl9, / 6 - 5 /e ,a/ 7 ,l 7 - 2 / 20 1 18 - 5 / 17 ^ 0 - 3/30 
Published at 'Washington.P.C., May 19 04 
BY THE U.S. COAST AND GEC 
EL ester Tones, Superin. 
reissued Feb. 1917 
DETIC SURVEY 
\te ident, 
Tim rs dfc #2 
O ^3-V W 4lc { 0,1 ( 
LIGHTS, BEACONS, BUOYS,AND DANGERS CORRECTED 
FOR INFORMATION RECEIVED TO DATE OF ISSUE 
w °Y t -k 
cj,'^ defj’o.rT^res are 
( Tortugas Harbor ) 
IaI 
C.& G.S. 
471 s 
.V. 
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