Because of the oceans’ depth, a harbour anchor is of no use to a ship at sea.
In its simplest form, a sea anchor is a canvas sack attached to a metal ring.
Tying it to the stem of a boat and dragging it through the water creates resistance, which slows the boat down.
In a strong gale, sea anchors can make the difference between life and death.
Blue blazers originated as military jackets worn by British sailors on the nineteenth-century ship HMS Blazer.