Nautical Term: House flag
Definition of House flag
A house flag is a distinctive flag that represents a specific merchant marine company. This flag is hoisted from the mainmast of merchant vessels that belong to that company.
For example, if the Merchant Marine Company named Blue Star Navigation operates a fleet of ships, each of these ships would fly the house flag of Blue Star Navigation from its mainmast to distinguish it as belonging to that particular merchant marine company.
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