U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  7

                                                                                
Station ID: 1890000                                PUBLICATION DATE:  10/07/2011
Name:       WAKE ISLAND, PACIFIC OCEAN                        
NOAA Chart: 81664                                  Latitude:         19° 17.4' N
USGS Quad:  NONE                                   Longitude:       166° 37.1' E


To reach the tidal bench marks from the National Weather Service (NWS) office at
the U.S. Army Base, exit the NWS parking lot, turn right onto Wake Highway, and
proceed around the runway until the small boat channel is reached.  The tide
house is located at Building # 1711, a light green concrete block building
located near the northern-most corner of the south seawall along the boat
channel.  The tidal bench marks are located in the vicinity.


                         T I D A L   B E N C H   M A R K S


                 PRIMARY BENCH MARK STAMPING:  NO 12 1961
                         DESIGNATION:          189 0000 TIDAL 12
                         ALIAS:                12

MONUMENTATION:           Tidal Station disk                        VM#:      129
AGENCY:                  US Coast and Geodetic Survey (USC&GS)     PID#:  TW0169
SETTING CLASSIFICATION:  Concrete apron


The primary bench mark is set in the concrete apron at the easterly corner of
the Boathouse (Building # 1709), 3.66 m (12.0 ft) SW of the boat basin wharf
face, 0.30 m (1.0 ft) NW of the east edge of concrete apron, and 0.30 m (1.0 ft)
SE of easterly corner of building.



                         BENCH MARK STAMPING:  NO 13 1965
                         DESIGNATION:          189 0000 TIDAL 13

MONUMENTATION:           Tidal Station disk                        VM#:      130
AGENCY:                  US Coast and Geodetic Survey (USC&GS)     PID:         
SETTING CLASSIFICATION:  Concrete apron


The bench mark is set in the concrete apron at the westerly corner of the
Boathouse (Building # 1705), 14 m (45 ft) SW of the wharf face, 2.99 m (9.8 ft)
NW of the center of the NW-most set of double doors on the west side of the
boathouse, and 0.2 m (0.5 ft) SW of the westerly corner of the Boathouse.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  7

                                                                                
Station ID: 1890000                                PUBLICATION DATE:  10/07/2011
Name:       WAKE ISLAND, PACIFIC OCEAN                        
NOAA Chart: 81664                                  Latitude:         19° 17.4' N
USGS Quad:  NONE                                   Longitude:       166° 37.1' E


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  0000 K 1978
                         DESIGNATION:          189 0000 TIDAL BM K

MONUMENTATION:           Tidal Station disk                        VM#:      136
AGENCY:                  National Ocean Survey (NOS)               PID:         
SETTING CLASSIFICATION:  Concrete sea wall


The bench mark is set in the south concrete seawall bordering the boat basin
entrance channel, 16 m (54 ft) WSW of the most NE channel seawall corner, 8 m
(27 ft) NE of the SW edge of the concrete seawall, and 0.3 m (1 ft) south of the
north edge of the seawall.



                         BENCH MARK STAMPING:  0000 L 1980
                         DESIGNATION:          189 0000 L

MONUMENTATION:           Tidal Station disk                        VM#:      137
AGENCY:                  National Ocean Survey (NOS)               PID#:  DM7505
SETTING CLASSIFICATION:  Concrete slab


The bench mark is set in a 12 m x 32 m (41 ft x 105 ft) abandoned concrete pad
overgrown with vines, 90 m (295 ft) WNW of bench mark 189 0000 J, 31.24 m (102.5
ft) NE of the centerline of the main road to the boathouse, 29.41 m (96.5 ft)
north of the north corner of an orange underground cable station cover, 10.18 m
(33.4 ft) south of the centerline of a dirt road adjacent to the pad, 6.83 m
(22.4 ft) east of the north-most of two tall grey 3-inch diameter PVC posts,
0.61 m (2.0 ft) south of the NW edge of the pad, and 0.46 m (1.5 ft) east of the
west edge of the pad.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  7

                                                                                
Station ID: 1890000                                PUBLICATION DATE:  10/07/2011
Name:       WAKE ISLAND, PACIFIC OCEAN                        
NOAA Chart: 81664                                  Latitude:         19° 17.4' N
USGS Quad:  NONE                                   Longitude:       166° 37.1' E


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  0000 N 1989
                         DESIGNATION:          189 0000 N

MONUMENTATION:           Tidal Station disk                        VM#:      139
AGENCY:                  National Ocean Survey (NOS)               PID:         
SETTING CLASSIFICATION:  Concrete foundation


The bench mark is set in the foundation of Building # 1706 in the north doorway
located south of the boat basin, 4.75 m (15.6 ft) east of the west side of
doorway, 0.13 m (0.45 ft) west of the east side of the doorway, and 0.09 m (0.30
ft) south of north edge of the foundation.



                         BENCH MARK STAMPING:  0000 P 1992
                         DESIGNATION:          189 0000 P

MONUMENTATION:           Tidal Station disk                        VM#:     6425
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Concrete sea wall


The bench mark is set in the east end of a concrete seawall, 100 m (328 ft)
south of Building #1715, 64 m (210 ft) south of middle of road leading to east
jetty, 34 m (110 ft) north of the high water line, 3.35 m (11.0 ft) north of the
east elbow of seawall, and 0.76 m (2.5 ft) above grade.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  7

                                                                                
Station ID: 1890000                                PUBLICATION DATE:  10/07/2011
Name:       WAKE ISLAND, PACIFIC OCEAN                        
NOAA Chart: 81664                                  Latitude:         19° 17.4' N
USGS Quad:  NONE                                   Longitude:       166° 37.1' E


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  0000 R 1994
                         DESIGNATION:          189 0000 R

MONUMENTATION:           Tidal Station disk                        VM#:     6446
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Concrete foundation


The bench mark is set flush in top of a 4 m x 2 m (14 ft x 6 ft) concrete
foundation, 82 m (270 ft) south of Building # 1716, 43 m (142 ft) SE of the SW
corner of a WWII concrete pillbox, 29 m (96 ft) SW of a large circular concrete
fuel tank foundaiton which no longer has a tank on it, 23 m (75 ft) NE of the
center of the paved road leading to the east jetty, 0.76 m (2.5 ft) SW of the NE
side of the foundation, 0.76 m (2.5 ft) SE of the NE side of the foundation, and
0.3 m (1 ft) above grade.



                         BENCH MARK STAMPING:  0000 S 2003
                         DESIGNATION:          189 0000 S

MONUMENTATION:           Tidal Station disk                        VM#:    17107
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Concrete pad


The bench mark is set flush in the most westerly corner of a 12 m x 30 m (40 ft
x 100 ft) concrete pad SE of the small boat harbor, 30.4 m (100 ft) south of a
green electrical concrete vault cover, 22.20 m (73 ft) east of the center of a
three way triangular road intersection, 1.10 m (3.6 ft) SE of the NW edge of the
concrete pad, and 0.79 m (2.6 ft) NE of the SW edge of the concrete pad.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  7

                                                                                
Station ID: 1890000                                PUBLICATION DATE:  10/07/2011
Name:       WAKE ISLAND, PACIFIC OCEAN                        
NOAA Chart: 81664                                  Latitude:         19° 17.4' N
USGS Quad:  NONE                                   Longitude:       166° 37.1' E


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  0000 U 2005
                         DESIGNATION:          189 0000 U

MONUMENTATION:           Tidal Station disk                        VM#:    17994
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Concrete bulkhead


The bench mark is set flush in the top of the concrete bullrail on the SE side
of the harbor on Wake Island, 72 m (236 ft) SE of the NW end of the bullrail,
64.67 m (212.7 ft) NW of the NE end of the bullrail, 3.24 m (10.6 ft) NE of the
electric meter, 0.81 m (2.7 ft) SW of the pier face, and 0.3 m (1.0 ft) above
grade. 

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  7

                                                                                
Station ID: 1890000                                PUBLICATION DATE:  10/07/2011
Name:       WAKE ISLAND, PACIFIC OCEAN                        
NOAA Chart: 81664                                  Latitude:         19° 17.4' N
USGS Quad:  NONE                                   Longitude:       166° 37.1' E


                            T I D A L   D A T U M S 


Tidal datums at WAKE ISLAND, PACIFIC OCEAN based on:

     LENGTH OF SERIES:      19 YEARS
     TIME PERIOD:           January 1983 - December 2001
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:   


Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:

     HIGHEST OBSERVED WATER LEVEL (08/31/2006)         =  1.819
     MEAN HIGHER HIGH WATER                     MHHW   =  0.717
     MEAN HIGH WATER                            MHW    =  0.653
     MEAN SEA LEVEL                             MSL    =  0.346
     MEAN TIDE LEVEL                            MTL    =  0.345
     MEAN LOW WATER                             MLW    =  0.037
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (10/19/1968)         = -0.652



Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     NO 12 1961                                  3.091    2.438
     NO 13 1965                                  3.177    2.524
     0000 K 1978                                 3.425    2.772
     0000 L 1980                                 4.090    3.437
     0000 N 1989                                 3.880    3.227
     0000 P 1992                                 3.968    3.315
     0000 R 1994                                 3.430    2.777
     0000 S 2003                                 3.707    3.054
     0000 U 2005                                 3.177    2.524


                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  7 of  7

                                                                                
Station ID: 1890000                                PUBLICATION DATE:  10/07/2011
Name:       WAKE ISLAND, PACIFIC OCEAN                        
NOAA Chart: 81664                                  Latitude:         19° 17.4' N
USGS Quad:  NONE                                   Longitude:       166° 37.1' E


                             D E F I N I T I O N S


Mean Sea Level (MSL) is a tidal datum determined over a 19-year National
Tidal Datum Epoch.  It pertains to local mean sea level and should not be
confused with any other fixed island datum.

This tide station location has a local island datum.  Island datums
are specific fixed geodetic datums whose elevation relationship to local MSL
and other tidal datums may not be consistent from one location to another.

The Vertical Mark Number (VM#) and PID# shown on the bench mark sheet are unique
identifiers for bench marks in the tidal and geodetic databases, respectively.
Each bench mark in either database has a single, unique VM# and/or PID# assigned.
Where both VM# and PID# are indicated, both tidal and geodetic elevations are
available for the bench mark listed.