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Report on magnetic investigations in the vicinity of Fremantle, in connection with naval degaussing operations

Created 17/10/2025

Updated 19/11/2025

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These investigations were carried out at the request of the Secretary for the Navy. The following report is intended to confirm provisional information made available to naval personnel during and at the conclusion of the surveys. The Fremantle Degaussing Range is situated in Gage Roads near Fremantle Harbour. The position of the coils forming shallow and deep ranges is shown in Fig. 1. Deperming operations were carried out in Careening Cove, Garden Island. The objects of the investigation were twofold. First, to determine the average normal values of the vertical (Z) and horizontal (H) force components of the Earth's magnetic field in that part of the harbour which would be occupied by a ship in passing over the coils, and second, to determine the average normal values of Z and H in the vicinity of Careening Cove, Garden Island.

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Field Value
Title Report on magnetic investigations in the vicinity of Fremantle, in connection with naval degaussing operations
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/en/dataset/2c83c9fc-d24b-46c0-9923-9246ca8176f3
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        115.5,
        -32.5
      ],
      [
        116.0,
        -32.5
      ],
      [
        116.0,
        -31.8
      ],
      [
        115.5,
        -31.8
      ],
      [
        115.5,
        -32.5
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Report on magnetic investigations in the vicinity of Fremantle, in connection with naval degaussing operations". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/report-on-magnetic-investigations-in-the-vicinity-of-fremantle-in-connection-with-naval-degauss