The main longitudinal timber of most hulls upon which the frames, deadwoods, and ends of the hull were mounted. With a magnetometer, archaeologists detect metal objects by the way the objects interrupt the regular flow of the earth's magnetic field. These interruptions are recorded by the magnetometer. A vertical timber set in a ship, used primarily to carry the sails, radar, or radio. Examples include clothing, dishes, buildings, pictures, and even automobiles.
Archaeologists study material culture of the past.
Mylar is made of a plastic like material that doesn't break down in water and is very useful for recording information in wet environments. Archaeologists use sheets of mylar underwater for paper. Organic material is anything that used to be alive, for example wood, bone and leather. The left hand side of a ship when facing the bow. A harbor with facilities for berthing ships, embarkation and disembarkation of passengers, and the loading and unloading of cargo.