1. Influence mines were a new development but moored contact mines were the most numerous. 2. An outer line of contact mines was laid approximately outside the main line of defence. 3. Contact mines usually blew a hole in ships'hulls.4. These torpedoes were improvised contact mines . 5. While returning to Shanghai on 9 October, " Waller " fouled a Japanese-moored " Shanghai "-type contact mine . 6. Displaying heroism, Spicer took part in the perilous work of sweeping for and disabling 27 contact mines during this period. 7. Displaying heroism, Morin took part in the perilous work of sweeping for and disabling 27 contact mines during this period. 8. Displaying heroism, Sundquist took part in the perilous work of sweeping for and disabling 27 contact mines during this period. 9. Destroyers in the assault force visually identified moored contact mines in the channel at low tide and destroyed them with gunfire. 10. Two Turkish contact mines exploded as our " first wave " approached the redoubt, blowing many of the men to pieces.
