• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar

Naval Historical Society of Australia

Preserving Australia's Naval History

  • Events
  • Account
  • Members Area
  • Volunteer
  • Donate
  • Contact us
  • Show Search
  • 0 items
Hide Search
Menu
  • Home
  • Research
    • Where to start
      • Research – We can help!
      • Self help
      • Naval Service Records
      • Library
      • Related Maritime websites
    • Resources
      • Articles
      • Videos
      • On This Day
      • Podcasts
      • Australian Military Ship Losses
      • RAN events on a  Google Earth Map
      • RAN Vessels – Where are they now?
      • Related Maritime websites
    • Other
      • Newsletters: Call The Hands
      • Occasional Papers and Historical Booklets
      • Books
      • HMAS Shropshire
      • Book reviews
    • Close
  • Naval Heritage Sites
    • World Heritage Listings
      • Cockatoo Island
    • National Heritage Listings
      • HMAS Sydney II and the HSK Kormoran Shipwreck Sites
      • HMVS Cerberus
    • Commonwealth Heritage Listings
      • Garden Island NSW
      • HMAS Watson
      • HMAS Penguin
      • Spectacle Island Explosives Complex NSW
      • Chowder Bay Naval Facilities
      • Beecroft Peninsula NSW
      • Admiralty House, Garden and Fortifications
      • HMAS Cerberus
      • Naval Offices QLD
      • Garden Island WA
      • Royal Australian Naval College ACT
      • Royal Australian Naval Transmitting Station ACT
    • NSW Heritage Listings
      • HMAS Rushcutter
    • Close
  • Naval Art
  • Tours & Cruises
    • Navy in Sydney Harbour Cruise, East
    • Navy in Sydney Harbour Cruise, West
    • Anniversary Cruise: Sydney under Japanese Attack
    • Tour Bookings
    • Close
  • About us
    • About Us
      • What we do
      • Our People
      • Office Bearers
      • Become a volunteer
      • Our Goals and Strategy
    • Organisation
      • Victoria Chapter
      • WA Chapter
      • ACT Chapter
    • Close
  • Membership
  • Shop
  • Become a volunteer
  • Donate
You are here: Home / Article topics / Publications / Naval Historical Review / Stand-by to Snort, Standing Charge Starboard!

Stand-by to Snort, Standing Charge Starboard!

Duchesne, Tim · Dec 17, 2003 · Print This Page

Author
Duchesne, Tim
Subjects
Ship design and development
Tags
submarine design, snorting
RAN Ships
None noted.
Publication
December 2003 edition of the Naval Historical Review (all rights reserved)

If, as frequently happened, the boat went deep with a significant vacuum, it would be important to return to periscope depth as soon as possible to raise and drain down the snort mast once more to return the boat’s atmosphere to atmospheric pressure (or ‘equalise the pressure’). This was because the rarified air in the submarine would be dangerously lacking in oxygen, which in turn would cause a level of light-headedness and possibly dangerous behaviour over time. If it was impossible, for operational reasons, to return to periscope depth fairly quickly, oxygen candles would be burnt in the ‘oxygen generators’ sited at each end of the boat. Alternatively, if plenty of ‘HP’ (High Pressure) air was available (at 4,000 lbs/sq in.) in the HP Air bottle groups, the vacuum could be partially relieved, at least up to a more acceptable level of pressure, by releasing HP air into ‘Q’ tank with the inboard vent open. This however was a noisy procedure and could not be employed with an enemy in reasonably close proximity, or with the likelihood of there being air-dropped sonobuoys in the vicinity.

A major improvement in the snort systems of the ‘T’ Conversions, some streamlined ‘A’s and the new ‘P’ and ‘O’ Classes was the introduction of separate and periscopic snort induction and exhaust masts. This meant that the induction system could be drained down and the engines(s) made ready before the induction mast was raised and the head valve exposed to possible detection. Their ‘diesel-electric’ configuration furthermore meant that both ‘sides’ could be engaged in charging the battery, whilst simultaneously, both motors and propellers were available for propulsion. As an added safety bonus, the noise reduction measures inherent in the design of ‘P’s and ‘O’s were so successful that the boats’ sonars were still effective whilst snorting. For an officer raised in ‘S’, ‘T’ and ‘A’ Classes, they were like a dream come true. Sadly for me, even this dream was spoilt by nearly three months as an ‘observer’ in one of the US Navy’s SSNs. Like all nuclear boats she was fitted with a snort system for use in emergency, but not once in over ten weeks dived did I hear the happy cry, usually (in pre-CO days) just as you’d managed to snatch some sleep, ‘Stand by to snort!’ I must confess that I didn’t miss it one bit.

Pages: Page 1 Page 2 Page 3 Page 4

Naval Historical Review, Ship design and development submarine design, snorting

Primary Sidebar

SUBSCRIBE

Sign up for our monthly e-newsletter.

  • This field is for validation purposes and should be left unchanged.

Categories

Latest Podcasts

  • The Fall of Singapore
  • HMAS Armidale
  • Napoleon, the Royal Navy and Me
  • The Case of the Unknown Sailor
  • Night of the midget subs — Sydney under attack

Links to other podcasts

Australian Naval History Podcasts
This podcast series examines Australia’s Naval history, featuring a variety of naval history experts from the Naval Studies Group and elsewhere.
Produced by the Naval Studies Group in conjunction with the Submarine Institute of Australia, the Australian Naval Institute, Naval Historical Society and the RAN Seapower Centre

Life on the Line Podcasts
Life on the Line tracks down Australian war veterans and records their stories.
These recordings can be accessed through Apple iTunes or for Android users, Stitcher.

Video Links

  • Australian War Memorial YouTube channel
  • Royal Australian Navy YouTube Channel
  • Research – We can help!
  • Naval Heritage Sites
  • Explore Naval Art
  • Dockyard Heritage Tour
  • About us
  • Shop
  • Events
  • Members Area
  • Volunteer
  • Donate
  • Contact us

Follow us

  • Facebook
  • YouTube
  • Members Area
  • Privacy Policy

Naval Historical Society of Australia Inc. Copyright © 2025