Commodore Blimp [closed]

I am reading Martin Booth's Gweilo. Booth mentions several times that his inflexible father was called "Commodore Blimp" behind his back by his colleagues in the navy. I do not understand this reference. I know commodore as a navy rank and blimp as an airship, but I do not understand why this nickname is mocking or funny. Can someone enlighten me?

Here's an excerpt:

'Just because the mercury touches eighty, Joyce, it doesn't mean we have to abandon all our bloody standards.'

There was a pause.

'You know what they call you, don't you?' She did not wait for a response. 'Commodore Blimp.'

'I don't give a bloody damn,' my father answered,

As The Photon suggests, this is almost certainly a reference to the character 'Colonel Blimp' invented by the cartoonist David Low. He was a pompous elderly army officer who expressed old-fashioned ideas in a bombastic manner. The author's father, being a naval officer, was given the nickname with a navy rank substituted.