llumb line

MAC CASC 19874, MAC CASC 18687
Object type plumb line
Culture/period Roman world
Materials lead
Technique
Mint
Production date -30 (MAC CASC 19874), -100 (MAC CASC 18687)
Museum Museu d'Arqueologia de Catalunya - CASC
Current location
Archaeological site Aiguablava I
Township Begur (Europa, Espanya, Catalunya, Girona, Baix Empordà)
Dimensions 132 x 97 mm 128 x 146 mm
Description
This is the most sophisticated instrument used for navigation in Roman times. It is a piece of lead that was tied to a rope with knots at a known interval. Depths were calculated by throwing it into the sea and counting the fathoms. A sticky substance was inserted at the bottom so that materials from the seabed could adhere to it, which meant the composition of the seabed could be identified.
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© Museu d'Arqueologia de Catalunya - CASC
Omeka ID 3036