THROUGH the Thomas Gray Memorial Trust, the Royal Society of Arts offered last year a prize of £75 for an invention, publication, diagram, etc., which was considered to be an advancement in the science or practice of navigation, proposed or invented in the period January 1, 1932–December 31, 1937. Thirty-six entries were submitted. The judges were of the opinion that none of the inventions put forward was deserving of the full prize, but they decided to make the following awards: £25 to W. Sommerville, of Benton, Northumberland, for his system of instruction and examination in the rule of the road at sea; £25 to Lieut.-Commander P. V. H. Weems, Annapolis, Maryland, U.S.A., for his second-setting watch. A prize of £25 for an essay on “The Stability of Ships” has been awarded to H. David, of Ely, Cardiff. The following prizes are offered for 1938: a prize of £25 for an invention, publication, diagram, etc., which is considered to be an advancement in the science or practice of navigation, proposed or invented in the period January 1, 1933–December 31, 1938 ; a prize of £25 for an essay on a navigational subject. Further information can be obtained from the Secretary, Royal Society of Arts, John Street, Adelphi, London, W.C.2.