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Appendix E: Mechanical Methods
Pages 103-105

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From page 103... ... As with the British wartime experience, these tests indicated that only slightly modified bottom trawls, whose lower edge penetrates a few inches into relatively soft sand or mud bottoms, were successful in picking up all bottom mines in their path except for those completely buried. Operationally, ensnared mines would be towed periodically from the channel being cleared and deposited in a holding area for later neutralization. Read the entire page →
From page 104... ... The conveyor system is a unique addition to the mechanical removal of land, beach, and surf zone mines and obstacles. However, the CPB suffers from difficulty of insertion during the early phases of an assault; its rate of clearance is relatively slow; the berm containing removed mines must be dealt with; and likely delays due to the vulnerability of the blade and conveyor system to mine blast make this, like JAMC, more suited to the larger removal job following the initial assault. Read the entire page →
From page 105... ... program of the 1960s modified a ship of similar size by using water ballast to reduce shock wave impedance, Styrofoam to provide extra buoyancy in case of flooding, deck-mounted long-stem Marion Tregurtha outboard power plants in case of shaft misalignment or propeller damage to the ship's own power system, and a shock-mounted pilot house for the seven-man crew. Tests indicated that the MSS suffered only minor structural damage, and no personnel damage, from a 2,000-pound mine detonated 35 feet off the beam at a depth of 65 feet. Read the entire page →

From page 103...

... As with the British wartime experience, these tests indicated that only slightly modified bottom trawls, whose lower edge penetrates a few inches into relatively soft sand or mud bottoms, were successful in picking up all bottom mines in their path except for those completely buried. Operationally, ensnared mines would be towed periodically from the channel being cleared and deposited in a holding area for later neutralization.

Read the entire page →

From page 104...

... The conveyor system is a unique addition to the mechanical removal of land, beach, and surf zone mines and obstacles. However, the CPB suffers from difficulty of insertion during the early phases of an assault; its rate of clearance is relatively slow; the berm containing removed mines must be dealt with; and likely delays due to the vulnerability of the blade and conveyor system to mine blast make this, like JAMC, more suited to the larger removal job following the initial assault.

Read the entire page →

From page 105...

... program of the 1960s modified a ship of similar size by using water ballast to reduce shock wave impedance, Styrofoam to provide extra buoyancy in case of flooding, deck-mounted long-stem Marion Tregurtha outboard power plants in case of shaft misalignment or propeller damage to the ship's own power system, and a shock-mounted pilot house for the seven-man crew. Tests indicated that the MSS suffered only minor structural damage, and no personnel damage, from a 2,000-pound mine detonated 35 feet off the beam at a depth of 65 feet.

Read the entire page →

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Appendix E: Mechanical Methods Pages 103-105

Appendix E: Mechanical Methods
Pages 103-105