Today marks the 100 year anniversary of the entry of the first Australian naval fleet into Sydney Harbour. Yes that was 100 years ago on October 4, 1913.
An International Fleet will celebrate that date under blue skies and perfect spring weather by participating in a fleet review. 37 ships from Australia and around the world will navigated their way around Sydney Harbour for the pleasure of nearly 2 million people who will hug every vantage point on the harbour foreshore.
The biggest ship of all, the American USS Chosin, a guided-missile cruiser will sail with other ships from Japan, Nigeria, Indonesia, France, Brunei and Spain. Other ships are from Singapore, Malaysia, Indonesia, Thailand, China and Brunei.
I was lucky enough to get some great photos, especially the one above, of a Swift-sure class submarine.
Submarines can float because the weight of water they displace is equal to the weight of the ship itself. Basically this is called the buoyant force. A submarine can control its buoyancy, thus allowing it to sink and surface at will.
When the submarine surfaces, compressed air flows from the air flasks into the ballast tanks and the water is forced out of the submarine until its overall density is less than the surrounding water, creating positive buoyancy and the submarine rises.
Unfortunately I didn’t have the time to wait and see this submarine surface so you will have to use your imagination.