The Challenger expedition used a similar instruments called Baillie sounding machines to extract samples from the sea bed, the sounding weights had a tube on the base which forced the seabed in when it hit.
The sounding weights had a tube on the base which forced the seabed in when it hit. The Challenger expedition used similar instruments called Baillie sounding machines to extract samples from the sea bed.
The Challenger expedition used similar instruments called Baillie sounding machines to extract samples from the sea bed. The sounding weights had a tube on the base which forced the seabed in when it hit.
The Challenger expedition used similar instruments called Baillie sounding machines to extract samples from the sea bed. The sounding weights had a tube on the base which forced the seabed in when it hit.