Sea Marks
نویسنده
چکیده
This is the first comprehensive history and survey of buoys, landmarks, lighthouses and other guides to navigation. It represents an enormous amount of research by the author, the well known retired Bristol Physician, John Naish. That it gave him a lot of pleasure comes through in the text, which is written in a way that is both authoritative and interesting, even to a landlubber. He traces the history from the third century B.C. to modern times, and has collected excellent illustrations. The author has had a lifelong interest in sailing in small boats, naval vessels and cruising yachts, so he really appreciates the importance of seamarks. Anyone who sails will want to read this book which brings the subject right up to date by discussing radar and the discipline of traffic regulation in the Channel. As a maritime nation, we neglect seamarks at our peril, and I was reminded of the book last month when I saw the Trinity House vessel, Winston Churchill, servicing the West and East Narrows buoys in Falmouth harbour.
منابع مشابه
Gamete Morphology of Six Species of Sea Urchins in Saipan, CNMI
• General sperm shape characterized by conical head • Eggs characterized as large spheres in vitelline membrane • Atlantic and Pacific populations’ spermatozoa show major morphological differences from each other (Landry et al. 2003) • Western Pacific species’ sperm head length measured twice that of Central Pacific (Marks et al. 2008). • Deep sea sperm head length elongated compared to shallow...
متن کاملAge Determination of Loggerhead Sea Turtles, Caretta caretta, by Incremental Growth Marks in the Skeleton
Zug, George R., Addison H. Wynn, and Carol Ruckdeschel. Age Determination of Loggerhead Sea Turtles, Caretta caretta, by Incremental Growth Marks in the Skeleton. Smithsonian Contributions to Zoology, number 427, 34 pages, 9 figures, 6 tables, 1 appendix, 1986.—Periosteal growth in the skeleton of Caretta caretta is cyclic and produces a record of distinct bony layers (growth marks). These laye...
متن کاملThe Legality of Wind and Altitude Assisted Performances in the Sprints
Based on a mathematical simulation which reproduces accurate split and velocity profiles for the 100 and 200 metre sprints, the magnitudes of altitude and mixed wind/altitude-assisted performances as compared to their sea-level equivalents are presented. It is shown that altitude-assisted marks for the 200 metre are significantly higher than for the 100 metre, suggesting that the “legality” of ...
متن کاملBack-calculating length from skeletal growth marks in loggerhead sea turtles Caretta caretta
Growth rates within and among sea turtles are highly variable, and gaining an understanding of this variability is difficult using traditional means, such as mark–recapture. Skeletochronology is becoming a standard technique for the assessment of individual growth rates in sea turtles. Here we present an analysis of the relationship between humerus diameter and somatic growth in loggerhead sea ...
متن کاملSedimentary structures and depositional environment of the Ashin Formation in Nakhlak area, Central Iran
Middle to Upper Triassic (Upper Ladinian to Lower Carnian) deep-sea sedimentary rocks crop out across a large area west of Nakhlak village, Central Iran and have been named Ashin Formation. The up to 304m thick, turbiditic, siliciclastic Ashin Formation consists of alternating turbiditic, thin- and medium-bedded calcareous sandstones, purple, fine-grained volcaniclastic sandstones, and mostly g...
متن کاملTABLE OF MARKS OF FINITE GROUPS
Let G be a finite group and C(G) be the family of representative conjugacy classes of subgroups of G. The matrix whose H;K-entry is the number of fixed points of the set G=K under the action of H is called the table of marks of G where H;K run through all elements in C(G). In this paper, we compute the table of marks and the markaracter table of groups of order pqr where p, q, r are prime numbers.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره 101 شماره
صفحات -
تاریخ انتشار 1986