− | ''This is a prototype, submarine oxygen torpedo with the "FaT guidance system" which uses a gyroscopic mechanism to change course overtime that was developed from another country for use on surface attacks on enemy warships.<br>This prototype oxygen torpedo was brought by U-boats for practical use on sea-lane control. | + | ''This is a prototype, submarine oxygen torpedo with the "FaT guidance system" which uses a gyroscopic mechanism to change course over time that was developed by that country for use on surface attacks on enemy warships.<br>This prototype oxygen torpedo was brought by U-boats for practical use on sea-lane control. |