Juan Caiti wrote:What's wrong? I can see other blue ones the pictures.
Juan
It's a very British thing, Juan. Australia, being a former British colony, has retained the British tradition of having separate national, naval and civil maritime flags. The Australian national flag is the blue one, the Royal Australian Navy's flag is a white ensign.

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The civil maritime flag is a red ensign, as posted above. Although the Australian flags have British origins, Australian law on ships' flags (Shipping Registration Act 1981) differs from British law (Merchant Shipping Act 1995).
Ships that are registered in Australia must fly the Australian red ensign. Small ships, fishing boats and pleasure craft can fly the national flag or the red ensign - so the boats in Peter's photos are not doing anything wrong.
In British law, it is a criminal offence to fly any national flag other than the red ensign, the union flag with a white border (the pilot jack), or an alternative ensign for which a government permit is held. In other words, it is a crime, punishable by a substantial fine, for a British ship or boat to fly the Union Flag. The maximum fine in a magistrates' court is £5,000, and in the Crown Court is unlimited. I'm sure that seems odd to foreigners - it is - but only the Royal Navy may fly the Union Flag.
In my case I belong to the RAF Sailing Association and have a permit to fly this ensign on my boat

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but I must (as the owner and permit holder) be present when it is flown. There is no requirement for British small craft to fly national colours in British waters, but if they choose to they must comply with the law.