A similar British submarine left Harwich on the east coast of England, and during a period of three weeks made seven patrol trips, and without once seeing the sun, finally returned to Harwich and picked up the buoy at the mouth of the harbor without the least difficulty. The navigation in this case was carried out entirely by the Gyro-Compass.

Figure 54 is a pho­to­graph of H. M. S. Lion, the flag­ship of Ad­mir­al Beat­ty in the bat­tle of Jut­land. This ship was pro­vid­ed with the Sper­ry Gy­ro-Com­pass equip­ment early in the war. Dur­ing the Jut­land en­gage­ment a fire broke out in a mag­a­zine of the Lion im­med­i­ate­ly be­low the two Mas­ter Com­pas­ses which were lo­cat­ed in one com­part­ment. It be­came so hot that the lead sheath­ing was melt­ed off the elec­tric cab­les and one of the Gy­ro-Com­pas­ses was heat­ed until its parts fused. Notwithstanding this same heat the other compass functioned throughout the entire action. Of the ships engaged in the battle of Jutland practically all except the destroyers were equipped with the Gyro-Compass. Every one of them performed perfectly throughout the action except in the case of the Lion on which one was destroyed by fire.

Hundreds of Sperry Gyro-Compasses are veterans of many battles and encounters under heavy gunfire and adverse conditions.

40. R. M. S Bergensfjord. 41. R. M. S. Aquitania. 42. S. S. Lenape. 43. S. S. Conneaut. 44. Yacht Lyndonia.

Ships Equipped with Sperry Gyro-Compass.

45. U.S.S. Pennsylvania—© E. Muller, Jr. 46. U.S.S. Bush. 47. H.M.S. Invincible—© Underwood & Underwood. 48. R. F. La Marsellaise—© Underwood & Underwood. 49. H.M. Submarine E-11—© Underwood & Underwood.

Ships Equipped with Sperry Gyro-Compass.