Average GPS coordinates for Medway Postcode location: -33.174, 149.483. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Medway on map:

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Listing cities & postcodes (2):
>> New South Wales, 2577 Medway, GPS coordinates: -34.3468,150.5026
>> New South Wales, 2820 Medway, GPS coordinates: -32.0016,148.463