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voor de liefhebbers van duikbootgeschiedenis :) 

Observer's directory of Royal Naval submarines, 1901-1982 (1982) 
by Maurice Cocker 

The purpose of this book is to fill an important gap in naval history. There has not previously been a book recording every submarine commissioned into the Royal Navy: this is an attempt to provide an illustrated directory to each one and also show the evolution of the submarine since 1901. 

There are obvious difficulties in compiling a record of this type: the service histories of many of the boats (submarines are traditionally still called boats) could each fill a book. It is left to others to describe such exploits. Similarly, there are continual modifications to the design of all but the smallest Classes. While such minutiae are of interest to the specialist, they are limited here, for the sake of brevity and clarity, to the more important changes. 

From the Holland Class of 1901 to the Type 2400. announced in 1979. the wheel has come full circle: the earliest submarines were powered by internal combustion engines and electric motors. Now, having gone through a cycle which has included steam turbines, both oil- and nuclear-driven, the latest designs are again planned to be diesel-powered as were the earlier ones. 

The first boats were armed with just one torpedo tube. Soon their number multiplied; guns worthy of a battleship were fitted; aircraft were carried; the submarine cruiser has armament equal to that of a frigate - though only for surface action. Today the torpedo remains the standard weapon and the heavy gun has been succeeded by the sub-surface to air and sub-surface to surface missiles. 
Another thing has changed - submariners have always needed stamina, but now more than ever with submarines which can. it is said, stay submerged for a year. 

Product Details Source: 
Hardcover: 128 pages 
Publisher: F. Warne (1982) 
Language: English 
Format: PDF 
Size: 76 Mb 

Thanks to Rockhound57 :)