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    SSM     NAVAL BASE 1
    Alternate names : Map ref.: NAVAL BASE BG33 2.8
    APREF/NGCA codes: Database number : 105636
    Stamp name:      NAV1 Date established :   01/09/1972
    Physical status : located (Thompson Surveying) Phys. status date :  05/06/2024
    Physical type :    brass plaqueHatch cover type : metal
    Mark set in :        concreteAccess type : 2 wheel drive
    Geographical CoordinatesMGA2020 Coordinates
    Horizontal datum : GDA2020Zone :             50
    Latitude :     S 32 10 58.45887Easting (m) :   386321.452
    Longitude :  E 115 47 38.84080Northing (m) :  6438653.128
    Convergence :       -0 38 32.45
    Point scale factor : 0.99975936
    Coordinate date :       12/09/2024
    Horizontal method :   GNSS Survey NetworkCadastral connection : Exists
    Relative horiz. accuracy :       30ppm ** Estimated relative uncertainty to adjacent marks
    Positional uncertainty (m) : 0.02 (95% Confidence level)
    Error Ellipse
    Semi-major axis (m) : 0.020
    Semi-minor axis (m) : 0.020
    Azimuth of semi-major axis (deg) : 53 40 49
    ** Projection coordinates are calculated from the geographical coordinates detailed above
    Project Grid - PCG2020Perth Coastal Grid 2020
    Easting (m) :   47873.967
    Northing (m) :  337868.620
    Convergence :       -0 0 43.23
    Point scale factor : 0.99999912
    Height Information
    Vertical datum :   AHD71Height type :          Orthometric
    Height (m) :         6.428Height date :          04/05/2000
    Established by :  Dept of Land Admin.State :                    Final
    Vertical method : Spirit LevellingVertical accuracy : 12rootK
    Derived GDA2020 ellipsoidal height (m) : -26.176N-Value (m) :          -32.604
    Geoid model :         AusGeoid2020
    ** Derived GDA2020 ellipsoidal height: h = H + N Interpolation :         Bi-Cubic
    Mark to hatch cover :  0.104
    Mark to ground level : 
    RM Info** Warning: RM azimuths and coordinates are unverified
    ** Azimuth, distance and height difference are relative to main mark
    RM1 Phys. status : located (Thompson Surveying) Date :   05/06/2024
    Phys. type :    spikeSet in : concrete
    Azimuth :           286 19 30Type :   True azimuth
    Distance (m) :    3.186Type :   Horizontal
    Height diff. (m) : -0.607Type :   Spirit Levelling
    RM to GL (m) :   0.500
    RM2 Phys. status : located (Thompson Surveying) Date :   05/06/2024
    Phys. type :    spikeSet in : concrete
    Azimuth :           0 20 6Type :   True azimuth
    Distance (m) :    3.465Type :   Horizontal
    Height diff. (m) : -0.212Type :   Spirit Levelling
    RM to GL (m) :   0.300
    RM3 Phys. status : located (Thompson Surveying) Date :   05/06/2024
    Phys. type :    spikeSet in : concrete
    Azimuth :           106 19 6Type :   True azimuth
    Distance (m) :    3.100Type :   Horizontal
    Height diff. (m) : 0.006Type :   Spirit Levelling
    RM to GL (m) :   0.100
    RM4 Phys. status : located (Thompson Surveying) Date :   05/06/2024
    Phys. type :    spikeSet in : concrete
    Azimuth :           180 20 6Type :   True azimuth
    Distance (m) :    2.928Type :   Horizontal
    Height diff. (m) : -0.232Type :   Spirit Levelling
    RM to GL (m) :   0.300
    RM Position Information** Warning: RM coordinates should be verified prior to use
    ** Coordinates are calculated from reference observations
    ** Coordinate accuracies commensurate with related observations
    RM1
    Geographical CoordinatesMGA2020 Coordinates
    Horizontal datum : GDA2020Zone :             50
    Latitude :     S 32 10 58.42980Easting (m) :   386318.386
    Longitude :  E 115 47 38.72408Northing (m) :  6438653.989
    Project Grid - PCG2020Perth Coastal Grid 2020
    Easting (m) :   47870.910
    Northing (m) :  337869.514
    Height Information
    Vertical datum :   AHD71
    Height (m) :         5.821
    RM2
    Geographical CoordinatesMGA2020 Coordinates
    Horizontal datum : GDA2020Zone :             50
    Latitude :     S 32 10 58.34638Easting (m) :   386321.434
    Longitude :  E 115 47 38.84157Northing (m) :  6438656.592
    Project Grid - PCG2020Perth Coastal Grid 2020
    Easting (m) :   47873.987
    Northing (m) :  337872.085
    Height Information
    Vertical datum :   AHD71
    Height (m) :         6.216
    RM3
    Geographical CoordinatesMGA2020 Coordinates
    Horizontal datum : GDA2020Zone :             50
    Latitude :     S 32 10 58.48715Easting (m) :   386324.436
    Longitude :  E 115 47 38.95437Northing (m) :  6438652.291
    Project Grid - PCG2020Perth Coastal Grid 2020
    Easting (m) :   47876.943
    Northing (m) :  337867.749
    Height Information
    Vertical datum :   AHD71
    Height (m) :         6.434
    RM4
    Geographical CoordinatesMGA2020 Coordinates
    Horizontal datum : GDA2020Zone :             50
    Latitude :     S 32 10 58.55392Easting (m) :   386321.468
    Longitude :  E 115 47 38.84015Northing (m) :  6438650.201
    Project Grid - PCG2020Perth Coastal Grid 2020
    Easting (m) :   47873.951
    Northing (m) :  337865.692
    Height Information
    Vertical datum :   AHD71
    Height (m) :         6.196
    Cadastral Connection Fieldbooks
    FB W.ROSE 110 *
    LG 159512
    Special Notes
    Unknown DateNav1,Rm1,Brown are on line.Nav1,Rm2,Nav2 are co-linear.
    ATRF 2014
    GDA2020 coordinates are equivalent to ATRF2014@2020.0. ATRF2014 coordinates can be determined by application of the Australian Plate Motion Model. For general and technical information on GDA2020 see http://www.icsm.gov.au/gda2020 and ATRF2014 see http://www.icsm.gov.au/australian-terrestrial-reference-frame.
    View the graphic summary
    SSM     NAVAL BASE 1
    Alternate names : Map ref.: NAVAL BASE BG33 2.8
    APREF/NGCA codes: Database number : 105636
    Stamp name:      NAV1 Date established :   01/09/1972
    Physical status : located (Thompson Surveying) Phys. status date :  05/06/2024
    Physical type :    brass plaqueHatch cover type : metal
    Mark set in :        concreteAccess type : 2 wheel drive
    Geographical CoordinatesMGA94 Coordinates
    Horizontal datum : GDA94Zone :             50
    Latitude :     S 32 10 58.50733Easting (m) :   386320.447
    Longitude :  E 115 47 38.80175Northing (m) :  6438651.625
    Convergence :       -0 38 32.47
    Point scale factor : 0.99975937
    Coordinate date :       09/10/2000
    Horizontal method :   Geodetic-TerrestrialCadastral connection : Exists
    Relative horiz. accuracy :       20ppm ** Estimated relative uncertainty to adjacent marks
    Positional uncertainty (m) : 0.013 (95% Confidence level)
    Error Ellipse
    Semi-major axis (m) : 0.013
    Semi-minor axis (m) : 0.013
    Azimuth of semi-major axis (deg) : 82 0 0
    ** Projection coordinates are calculated from the geographical coordinates detailed above
    Project Grid - PCG94Perth Coastal Grid 1994
    Easting (m) :   47872.945
    Northing (m) :  237867.127
    Convergence :       -0 0 43.25
    Point scale factor : 0.99999912
    Height Information
    Vertical datum :   AHD71Height type :          Orthometric
    Height (m) :         6.428Height date :          04/05/2000
    Established by :  Dept of Land Admin.State :                    Final
    Vertical method : Spirit LevellingVertical accuracy : 12rootK
    Derived GDA94 ellipsoidal height (m) : -26.1N-Value (m) :          -32.528
    Geoid model :         AUSGeoid09 V1.01
    ** Derived GDA94 ellipsoidal height: h = H + N Interpolation :         Bi-Cubic
    Mark to hatch cover :  0.104
    Mark to ground level : 
    RM Info** Warning: RM azimuths and coordinates are unverified
    ** Azimuth, distance and height difference are relative to main mark
    RM1 Phys. status : located (Thompson Surveying) Date :   05/06/2024
    Phys. type :    spikeSet in : concrete
    Azimuth :           286 19 30Type :   True azimuth
    Distance (m) :    3.186Type :   Horizontal
    Height diff. (m) : -0.607Type :   Spirit Levelling
    RM to GL (m) :   0.500
    RM2 Phys. status : located (Thompson Surveying) Date :   05/06/2024
    Phys. type :    spikeSet in : concrete
    Azimuth :           0 20 6Type :   True azimuth
    Distance (m) :    3.465Type :   Horizontal
    Height diff. (m) : -0.212Type :   Spirit Levelling
    RM to GL (m) :   0.300
    RM3 Phys. status : located (Thompson Surveying) Date :   05/06/2024
    Phys. type :    spikeSet in : concrete
    Azimuth :           106 19 6Type :   True azimuth
    Distance (m) :    3.100Type :   Horizontal
    Height diff. (m) : 0.006Type :   Spirit Levelling
    RM to GL (m) :   0.100
    RM4 Phys. status : located (Thompson Surveying) Date :   05/06/2024
    Phys. type :    spikeSet in : concrete
    Azimuth :           180 20 6Type :   True azimuth
    Distance (m) :    2.928Type :   Horizontal
    Height diff. (m) : -0.232Type :   Spirit Levelling
    RM to GL (m) :   0.300
    RM Position Information** Warning: RM coordinates should be verified prior to use
    ** Coordinates are calculated from reference observations
    ** Coordinate accuracies commensurate with related observations
    RM1
    Geographical CoordinatesMGA94 Coordinates
    Horizontal datum : GDA94Zone :             50
    Latitude :     S 32 10 58.47826Easting (m) :   386317.380
    Longitude :  E 115 47 38.68503Northing (m) :  6438652.486
    Project Grid - PCG94Perth Coastal Grid 1994
    Easting (m) :   47869.887
    Northing (m) :  237868.022
    Height Information
    Vertical datum :   AHD71
    Height (m) :         5.821
    RM2
    Geographical CoordinatesMGA94 Coordinates
    Horizontal datum : GDA94Zone :             50
    Latitude :     S 32 10 58.39484Easting (m) :   386320.428
    Longitude :  E 115 47 38.80252Northing (m) :  6438655.089
    Project Grid - PCG94Perth Coastal Grid 1994
    Easting (m) :   47872.964
    Northing (m) :  237870.592
    Height Information
    Vertical datum :   AHD71
    Height (m) :         6.216
    RM3
    Geographical CoordinatesMGA94 Coordinates
    Horizontal datum : GDA94Zone :             50
    Latitude :     S 32 10 58.53561Easting (m) :   386323.431
    Longitude :  E 115 47 38.91532Northing (m) :  6438650.787
    Project Grid - PCG94Perth Coastal Grid 1994
    Easting (m) :   47875.920
    Northing (m) :  237866.256
    Height Information
    Vertical datum :   AHD71
    Height (m) :         6.434
    RM4
    Geographical CoordinatesMGA94 Coordinates
    Horizontal datum : GDA94Zone :             50
    Latitude :     S 32 10 58.60239Easting (m) :   386320.462
    Longitude :  E 115 47 38.80110Northing (m) :  6438648.697
    Project Grid - PCG94Perth Coastal Grid 1994
    Easting (m) :   47872.928
    Northing (m) :  237864.199
    Height Information
    Vertical datum :   AHD71
    Height (m) :         6.196
    Cadastral Connection Fieldbooks
    FB W.ROSE 110 *
    LG 159512
    Special Notes
    Unknown DateNav1,Rm1,Brown are on line.Nav1,Rm2,Nav2 are co-linear.