In 1911 he took extra education to work as an average adjuster like his father.

He became a marine insurance average adjuster (a claims specialist) based in Liverpool.

An average adjuster is a marine claims specialist responsible for adjusting and providing the general average statement.

From that came an "average adjuster" who decided how to apportion a loss between the owners and insurers of a ship and cargo.

This business prospered, and McArthur became one of the best-known average adjusters in England.

In his early career he took his examen artium, stayed at sea for some time and took an examination as an average adjuster.

To insure the fairness of the adjustment an General Average adjuster is appointed by the shipowner and paid by the insurer.

He had gone through commerce school as well as an average adjuster's exam, and studied law at the University of Oslo during World War II.

Sir Francis Chatillon Danson (1855-3 July 1926) was a British average adjuster (calculating liabilities for marine insurance).

Nausch, Hogan & Murray (NHM) is a privately held international insurance brokerage firm established in 1976 by an average adjuster, an admiralty attorney, and a marine broker.

Born in London in 1921 as Audrey Holman, during World War II she worked for an Average Adjusters firm in London.

If you are a loss adjuster, average adjuster, motor assessor, surveyor or other expert (see paragraph 9.3.1), your services (such as assessing damage or investigating potential fraud) are normally standard rated.

Instead, they sensibly decided to avoid disputes and differences by jointly employing one average adjuster to advise them on how the loss should be apportioned and agreed to accept and act on his advice.

Each of them might have engaged a separate average adjuster to advise him: had these not agreed, a dispute could have arisen between the parties which they might have submitted to arbitrationa somewhat unusual course in business of this kind.

Apportionment of cargo damage was referred to an average adjuster in Tharsis Sulphur & Copper Co Ltd v Loftus (1872) LR 8 CP 1, in circumstances where he appears to have determined the issue as an expert reference.

Immediately after Bigham's appointment was announced, The Times newspaper reported on Saturday 16 October that the Liberal Unionist candidate was likely to be Charles McArthur, an average adjuster from Liverpool and former chairman of the city's chamber of commerce.

He served as chairman of the Association of Average Adjusters in the United Kingdom, as well as President of Liverpool Chamber of Commerce from 1892 to 1896, and as a Justice of the Peace in Liverpool.

Never interested in party politics, MacKinnon was president of the Average Adjusters' Association (1935), of the Johnson Society of Lichfield (1933), and of the Buckinghamshire Archaeological Society, chairman of Buckinghamshire quarter sessions, and member of the Historical Manuscripts Commission.