Aerial photo of the Hermine-Bretagne, the excavation's support ship, anchored at the Natière site. The mouth of the Rance River and the tidal power station can be seen in the background. (Cliché : NAT01_E0019)
The indispensable (and reassuring) lifeline, which connects the support ship with the archaeological site, and guides the divers. (Réf. : NAT06_SM0120)
Taking measurements along the X, Y and Z axes. Detail of one of the horizontal bars of the grid, fitted with a gradated ruler. The ruler, printed on highly resistant vinyl tape, has simplified gradations designed by the excavation team to be read at a distance. They are visible from roughly two metres away.
Taking measurements along the X, Y and Z axes. The 3 x 3m excavation squares can themselves be subdivided into nine squares, one metre on a side. (Ref. : Nat03_SM0128)
Grid bar, broken during the winter. At the end of the 2003 campaign, the team decided to leave three 3 x 3m excavation units in place, in order to have a fixed reference point to faciliate reinstallation of the grid in 2004. The frames that were left on site were lowered all the way down, and their feet anchored in the substratum. When the team returned the following year, none of the frames were in place. Their elements – disconnected, bent and broken – were finally located several dozen metres away. They were likely snagged by a dragnet. (Réf. : NAT04_M275)