Trends in Merchant Shipping (1969-1980),
Abstract
This study of merchant shipping trends has been inspired by the need of the underwater acoustics community to understand trends in measured low-frequency deep-ocean ambient noise levels; and, by the desire to be able to predict future levels. It is being given wider distribution because of the interest of other groups in the subject. It must be pointed out that most of the numbers quoted are estimates, or rounded-off values; and, that in acoustics one deals with numbers on a logarithmic scale, and exact values are not necessary. The reader should also be warned that some of the divisions of ships into categories do not conform to those usually used in the marine industry, but rather are intended to better serve the purposes of acoustic studies.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 15, 1975
- Accession Number
- ADA017076
Entities
People
- Donald Ross