Oil painting showing a warship at anchor in the harbour of a fortified coastal town. A snow rig is similar to that found on a brig, featuring two masts with square sails on each. Unlike a brig, a snow has an extra small mast fitted behind the main lower mast. Known as the trysail mast this is set with a triangular sail known as a spanker. Snow-rigged sailing vesels used to be common around Britain's coasts.
© Science Museum / Science & Society Picture Library