The following text may have been generated by Optical Character Recognition, with varying degrees of accuracy. Reader beware!

Equipment Used Afloat, Ashore Electric Hoists for Launching Boats—Path and Position Indicator—Magnetic Master Compass—Streamline Rudder Saves Power and Reduces Yawing HE accompanying illustration t shows the application of electric hoists for handling smaller boats. The track and the hoists were built and erected by the Chisholm- Moore Mfg. Co., Cleveland, on the Lake Erie water front at the residence of A. H. Chappelka, Willoughby, O. The steel motor boat shown is of regular stock model manufactured by Mullin Body Corp., Salem, O. This installation consists of an I- beam track and two small weather- proof and completely enclosed electric hoists. The I-beam track is suspended from the roof supports of the inside of the boat house and is carried by structural steel supports on the out- side. One of the electric hoists is attached to a motor driven trolley and the other to a plain push trolley. The two hoists and trolleys are con- nected by a swiveling “stiff-arm” or rod the length of which is determined by the length of the boat. Conductor wires strung along the track supply the electric current to the hoists and trolley. Control ropes for hoisting and con- veying are within easy reach of the operator. All that is necessary to start the hoist motors is a pull on the proper control rope. The hoists start lifting the boat to the desired height. A pull on another control rope causes the motor driven trolleys to move along the track. When the boat reaches the right point a pull on the proper control rope lowers the boat into the water. When desiring to re- turn the boat to the boat house the same operations lift and convey the boat to its resting place. Provision for disconnecting the elec- tric current from the conductor wires after the boat has been lowered into the water can easily be made by lo- cating a remote control switch at the water end of the track and the switch can be turned off before leav- ing the pier and turned on upon arrival. Though this particular installation applies to the launching of a _ boat from a boat house, it is entirely pos- sible that a practical application could be made of similar hoists for putting launches, motor life boats or other larger boats carried on board ship into the water, as required, with a high degree of reliability. UCH thought and effort has been expended in the develop- ment of devices to make navi- M gation of ships safer and surer. As a result of ten years of work, two . New Aids to N avigation By Robert G. Skerrett instruments, one known as a path and position indicator and the other as a magnetic master compass, have been developed by Edward L. Holmes, who is the inventor, and these instruments. PATH AND POSITION INDICATOR ON BOARD AN AMERICAN FREIGHTER AND OPER- ATING IN CONJUNCTION MARINE REVIEW—September, 1927 WITH A GYRO COMPASS 35.