52 
H.I., the E.20. can truly be styled luxurious in its fittings 
and appointments.’ On the question of offence and defence 
against submarines and torpedoes, Mr. Whyman discussed 
and illustrated the harbour boom, ship’s nets, vessels of 
shallow draught — the “monitor” type, the development 
of tactics calculated to baffle the submarine, and the very 
active warfare waged against submarines by aircraft. 
In conclusion, the lecturer spoke at some length of the 
failure of the submarine blockade of our shores which the 
Germans declared on February 18th, 1915. By diagrams 
and statistics, he made his audience realise the almost neg- 
ligible damage done to the vast volume of our merchantile 
traffic and the rapid waning of the enemy’s activities after 
August, 1915 — and this, in spite of the feverish activity of 
the Germans in submarine construction during the early 
summer, when flushed by their first successes. 
-»■ 
