How fast is safe at night.

Discussion in 'All Things Boats & Boating' started by Frosty, Jul 18, 2012.

  1. masalai
    Joined: Oct 2007
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    masalai masalai

    I have yet to see an unlit buoy at night... except to mark a mooring, which does not require to be lit... But then in submarines, one would not necessarily know if it was lit - or even daylight? :D :D :eek:
     
  2. Frosty

    Frosty Previous Member

    Thats because they are unlit. Once you get away from nanny Auss you will see lots of infuriating stuff at sea.

    There are unlit ships out there with drifting nets unlit.

    Ive generally given up with night time sailing --just not worth it. All the stories I have of terrible night mare stuff at sea is / was at night . Night vision was imperative but any light at all often just floods out the object. Sometime you can get an idea of what or how big it is.

    But 20kts at night Whoooa thats like driving in your car and closing you eyes
     
  3. MechaNik
    Joined: Jan 2011
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    MechaNik Senior Member

    It seems most people are willing to accept the risk. The technology has been around for some time, but after looking at the price most decide again to accept the risk.
    If you are someone that that is willing to pay for added safety then take a look at some forward facing sounders that can perceive surface objects. The most impressive I have seen is from www.farsounder.com

    At night some people like to stay close to shore, for me I like to get out into the open water. Sometimes you don't have a choice.
    Risk assessment is all about playing out the what if's.
     
  4. Silver Raven
    Joined: Oct 2011
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    Silver Raven Senior Member

    Gooday 'Mech' - I've sent them an e-mail as to cost, weight & power consumption - - let's see if they answer.

    Most interesting to see if any of us can afford such a product. I can't have it if it weighs to much or uses to much power. I've a minimalist 40' quick tri - not a big motoring 'gin' palace. I'll let everyone know what I get back for them. Ciao, james

    PS Thanks for the info - appreciate it. jj
     
  5. masalai
    Joined: Oct 2007
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    masalai masalai

    MechaNik,
    As the illustration suggests - may be justified in a 25knot passenger cruise liner, (WHICH DID NOT SEEM TO WORK RECENTLY WHEN ONE HIT THE ROCKS WITH LOSS OF LIFE)...; but that gear cannot readily see small boats or containers bobbing around at sea level at night and nor can radar... AIS only works if ALL parties have the gear turned on and a watchman who is awake and attentive at all times...

    Nothing beats attentive eyes and daylight on a clear day - all other cases use utmost caution...
     
  6. MechaNik
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    MechaNik Senior Member

    In the presentation I attended it was shown to spot a buoy floating on the surface. Cost is significant I recall somewhere over 100k and the weights over 30 kgs.
     
  7. masalai
    Joined: Oct 2007
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    masalai masalai

    Wow - I cannot believe it - especially in a long swell of about 5 m height (pleasant for a big ship) but could be on the top of a wave some 2 cycles away? in my 40ft cat... some of the swells crest 20 to 100m apart. A very difficult achievement...
     
  8. MechaNik
    Joined: Jan 2011
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    MechaNik Senior Member

    Masalai,
    I don't disagree with you. All of these devices and others not mentioned are all just aids, of soon as you trust it completely....BANG. Although even during day time two sets of eyes miss things all the time, or see it too late to take action especially in a sea state.
     
  9. Submarine Tom

    Submarine Tom Previous Member

    You haven't sailed very much if you've never seen an unlit buoy.

    There are no navigation buoys for submerged submarines.

    You need to get out more before making such statements.
     
  10. Frosty

    Frosty Previous Member

    You dont trust nothing. If I know there should be a bouy there and I dont see it I move out by miles. If I see it flashing and its recognizable then all is good.

    Even GPS is set by old charts that were from Sextants hundreds of years ago. Never trust a GPS to within a mile and same with the chart.
     
  11. masalai
    Joined: Oct 2007
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    masalai masalai

    Well Malaysia had minimal navigation aids in mid 60's (around Penang and down the coast to KL) no sailing then just daytrips in a speedboat, Melanesia (surrounds the northern 3/4 of the Coral sea still has no navigation aids apart from Australian waters, which are fairly good with radio-beacons covered by AIS lighthouses, lit channel markers, and lit buoys marking most features near shipping channels... The inside of the Great Barrier Reef seems strewn with sundry rocky outcrops and wrecks many charted, on fairly reliable charts... Beyond that I have not much interest at my age as there is more than enough to explore to keep me interested for some 20 years and more if cruising is my activity...
     
  12. Silver Raven
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    Silver Raven Senior Member

    Gooday "The Grand Pipe" - now that really is a great 'avatar' thingy.

    Wise words never trust ANYTHING not even - some times your eyes - - we can all miss things & don't always get it as right as we'd like to - - sometimes we see nice-candy & it turns out to be 'bitters in disguise' as we all know.

    'Sub' your - spot on - if you haven't seen/just missed or come far to close to - - dangerous floating objects - you probably haven't got - out of the bath yet - for sure.

    Now to the 'forward' sonar - mentioned - - They have got back to me - the short of it is; 50 kgs (110 lbs) all up Plus 100 watts of continuous power plus $98,000.00 to $165,000.00 USD - not installed or wired in.

    Great value for G'Gates' or 'Ellison' but just a wee tad over my monthly pension. Ciao, all - james
     
  13. Manie B
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    Manie B Senior Member

    thanks for this discussion
    now i know it is out of the question

    :eek::eek::eek:

    ouch
     
  14. tunnels

    tunnels Previous Member

    That has got to be the dumbest question i have ever seen !!
    How fast would you drive at night blind folded and you head in a paper bag ??The car can do 100 mph !! :eek:

    This is like the post from yesterday about the overlaoded boat and vessels over 20 feet should having a sticker on the dash telling you how many people you are allowed to carry .
    So you load you boat till the water is coming over the gunwale and then kick one out !! logical !!Thats thinking !!
    Has nothng to do with a thing called good old common sense !!!. some parents do have em and who do you blame??
    the parents for Giving birth to a kid like that ?.
    the barman that got the old man drunk!!
    your mum had her way with the old drunken fool while he was totally intoxicated !!
    what about the teachs at the school you went !!
    and then theres girl next door with her window looking toward your house and all the thing she used to get up to !!
    i used to have one of them but it didnt affect me !!! so there !!
    could be the boss where you work they can get on your case and reall make you angre!! what about the sister inlaw and her crazy husband and there 6 children !. got to blame some one !!!
     

  15. masalai
    Joined: Oct 2007
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    Location: cruising, Australia

    masalai masalai

    How many beers?
     
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