Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 167,717 pages of information and 247,131 images on early companies, their products and the people who designed and built them.
Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,919 pages of information and 233,587 images on early companies, their products and the people who designed and built them.
Adrian Francis Sykes (1889 - 1959), B.Sc., A.M.I.E.E. Managing Director, Sykes-Morris Submarine Acoustics, Ltd.
In association with Professor MacGregor-Morris, M.I.E.E., invented and developed the portable directional hydrophone.
Grace's Guide web site design is Copyright © 2025 by Grace's Guide Ltd. The text of this web site is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy.
MW1.43