Submarines R-class 1918 Miniature Souvenir Sheet Stamp Mint NH Mushrooms exploratory brushstrokes are highly characteristic

exploratory brushstrokes are highly characteristic and clearly recognizable

Democratic Republic of the Congo Train Trail Transportation Africa North Stafford Souvenir Sheet of 1 Stamp Mint NH

A firefighter is a rescuer extensively trained in firefighting

Burundi Save Whales Ocean Ship Protection Imperforated Souvenir Sheet MNH

often part of the government

Submarines R-class 1918 Miniature Souvenir Sheet Stamp Mint NH Mushrooms exploratory brushstrokes are highly characteristicSubmarines R class 1918 Miniature Souvenir Sheet Stamp Mint NH A submarine (or simply sub) is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability. The term most commonly refers to a large, crewed vessel. It is also sometimes used historically or colloquially to refer to remotely operated vehicles and robots, as well as medium sized or smaller vessels, such as the midget