Mapping the seas

Discover how techniques for mapping the seas have changed throughout history.

People and places -Mapping - Mapping the seas

Learning Points
The technique of measuring the sea's depth using a weighted line is called depth sounding.

Sonar technology allows mapmakers to create increasingly accurate maps of the ocean floor.

A Twig Curriculum Film. Delivering key learning points. Get straight to the facts in just three minutes – directly linked to core learning, Twig's curriculum films will fit neatly into your lesson plans.