pl23_ship4403.jpg

Figure 31. Aime messenger ca. 1843. The Frenchman Georges Aime was among the first to systematically employ the principle of a messenger in order to communicatewith submerged instruments. The messenger was sent down the line and activatedsome form of opening or closing mechanism on the sampling instrument. Aimeused only solid messengers which had to have the line or cable run through them.