Upload
raptor661
View
231
Download
5
Tags:
Embed Size (px)
DESCRIPTION
Power point on some coastal defences.
Citation preview
AUCKLAND COASTAL DEFENCES 1939 - 1944
AUCKLAND COASTAL DEFENCES 1939 - 1944SCOPETypes of defences.Mines, Harbour Boom and Indicator Loops.Where they were, in and around the harbour.War Office Policy
First class defended port, Auckland
Gun batteriesMotutapu, North Head and TakapunaPort war Signal Station
HARBOUR BOOMWar Cabinet decides to construct Harbour Boom 30 December 1940.
Wooden piles from Australia.
Wire net from the United States. Harbour boom completed in September 1942. HARBOUR BOOM
MINEFIELDSCONTACT MINEFIELDS:200 between Tiritiri Matangi and Motuhauraki Islands200 between Tiritiri Matangi Island and the Noises Rocks16 between Rakino Island and the Noises Rocks6 between Motutapu and Rakino Island
CONTROLLED MINEFIELDS:9 Loops in the Whangaparaoa Peninsula
MINEFIELDS
INDICATOR LOOPSLoop A - Rangitoto channel up from Takapuna Head
Loop B - Across the Motukorea channel between Rangitoto and Browns Island
Loop 1 & 2 Two between Waiheke Island and the Noises Rocks
Loop 3 Two between the Noises Rocks and Tiritiri Matangi Island
Loop 4 - Across the northern entrance to the Whangaparoa Passage INDICATOR LOOPS
HARBOUR BOOM
ASDIC ARRAYSA HDA Between Motutapu and Waiheke IslandB,C and D HDA - between Whangaparaoa Peninsula and Rakino Island.
1, 2 and 3 HDA - Off Takapuna Head and between Browns and Rangitoto Islands
High Detection Assisted Arrays
Puna Anti Submarine Fixed Defence Station