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  1. #451
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    Quote Originally Posted by morpheus View Post
    Maybe something like the Aeryon Skyranger ?
    https://www.aeryon.com/military/tactical-operations
    Meh. You'll pay ridiculous money for a platform no where near as advanced as the likes of a DJI or equivalent mainstream commercial vendor. The sensor (camera) etc is where the money should be going to

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  3. #452
    Moderator DeV's Avatar
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    Quote Originally Posted by TangoSierra View Post
    200,000 for 4 DJI Mavik Pro's? Wtf? :-)
    Quote Originally Posted by morpheus View Post
    Maybe something like the Aeryon Skyranger ?
    https://www.aeryon.com/military/tactical-operations
    Quote Originally Posted by TangoSierra View Post
    Meh. You'll pay ridiculous money for a platform no where near as advanced as the likes of a DJI or equivalent mainstream commercial vendor. The sensor (camera) etc is where the money should be going to
    To include TI/IR option

  4. #453
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    Mavik pro €949 each on the net.

  5. #454
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    Quote Originally Posted by DeV View Post
    To include TI/IR option
    Do they mention any jamming resistance, encryption or anything in the spec?

  6. #455
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    Basic IT hygiene will cover encryption/secure transmission

    No defence against jamming. All transmitters can be jammed.

    Best defence is active offense - Directional Finding EW coupled with a "kinetic" response to a confirmed jamming source

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  8. #456
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    Quote Originally Posted by TangoSierra View Post
    Basic IT hygiene will cover encryption/secure transmission

    No defence against jamming. All transmitters can be jammed.

    Best defence is active offense - Directional Finding EW coupled with a "kinetic" response to a confirmed jamming source
    All I would say is (imo) it largely depends on your adversary - wideband adaptive freq hopping will be a lot trickier for small groups to counter than, than say something locked to 2.4GHz.

    I'm just trying to justify the costs - if they're going to use a COTS civilian spec radio, my mind would boggle - but if they're using something labelled Harris, well it would make the sums balance up a bit...

    No argument with the best way to deal with a confirmed jamming source
    Last edited by pym; 20th July 2017 at 22:54.

  9. #457
    Moderator DeV's Avatar
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    Feasibility study for the peace support and leadership centre

  10. #458
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    Something as encompassing as EW needs a planned common response such as Controlled Radiation pattern Antennae (CPRA) technology, coupled with non magnetron radars such as TWT. Anti-jam and anti- spoof abilities such as dedicated missile systems to take out en antennae is common, even when mounted on schools and hospitals. The construction of CPRA units needs to be supervised in-country or approved source.
    In general our DF contract environment and fiscal constraints is neutering our military edge with a continuing decline to social type responses and duties normally taken up by civilian agencies. The latter situation has overtaken both the Naval Service and Air Corps ability to fully Defend the State.

  11. #459
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    Quote Originally Posted by ancientmariner View Post
    Something as encompassing as EW needs a planned common response such as Controlled Radiation pattern Antennae (CPRA) technology, coupled with non magnetron radars such as TWT. Anti-jam and anti- spoof abilities such as dedicated missile systems to take out en antennae is common, even when mounted on schools and hospitals. The construction of CPRA units needs to be supervised in-country or approved source.
    In general our DF contract environment and fiscal constraints is neutering our military edge with a continuing decline to social type responses and duties normally taken up by civilian agencies. The latter situation has overtaken both the Naval Service and Air Corps ability to fully Defend the State.
    Further to the above, I believe Navywise we should consider Maritime Inertial navigation systems coupled with GPS for comparison purposes. Gps is a fragile system while submarines with INS are happy with accuracy achieved with that system. Equally surface ships with MINS should get equivalent results and system data as required for weapon and navigation needs.
    The presence of a cyber industry from a non-aligned country has potential pitfalls for future consideration as systems begin to absorb their output. It all has interesting potential in the Cyber Security field.Thanks to a naive Government.
    Last edited by ancientmariner; 24th December 2017 at 17:20.

  12. #460
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    The worldwide reliance on GPS for navigation, both on sea and in the air is a worrying trend, particularly as at sea the move towards unmabnned vessels seems to be advancing at speed.
    When the US decide to power down, as they did quite recently, are modern crews able to revert to the older methods?
    The Decca Chain is gone. I believe Loran C was shut down worldwide in 2015. What other non satellite Navaids are still active?
    German 1: Private Schnutz, I have bad news for you.
    German 2: Private? I am a general!
    German 1: That is the bad news.

  13. #461
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    too much reliance on sat nav...otherwise back to the sextant ,,,

  14. #462
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    Quote Originally Posted by na grohmití View Post
    The worldwide reliance on GPS for navigation, both on sea and in the air is a worrying trend, particularly as at sea the move towards unmabnned vessels seems to be advancing at speed.
    When the US decide to power down, as they did quite recently, are modern crews able to revert to the older methods?
    The Decca Chain is gone. I believe Loran C was shut down worldwide in 2015. What other non satellite Navaids are still active?
    Loran C is historically defunct with no major users or finance. it was developed during WW11 and good within 600nm of an aerial system. There is an antenna at Loop Head in Co. Clare. There is some work on ELoran, an enhanced terrestrial based system. Russians and others are still tinkering with that. The GPS is not bullet proof with very low wattage at the receivers aerial, less than a domestic light bulb, and prone to interference. The USN are retraining in manual Astro -Navigation. I would be interested in seeing Inertial Navigation developed for Surface ships. It works on a system of accelerometers , gyroscopes, magnometers, to keep track from the position of departure. It can be complex and expensive but getting cheaper with strap-down systems such as in the Raytheon Anscheutz Marine Inertial Navigation Systems. Once the system knows where you started from it continually calculates your current position and can also be compared side by side with GPS. It is your only choice if you want to be free of somebody else's signals.

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  16. #463
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  18. #464
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    There are also the EU Galileo, Chinese BeiDou and Russian Glonass satnav systems in addition to US GPS

  19. #465
    Lord Chief Bottlewasher trellheim's Avatar
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    there is also ring laser gyros
    "Are they trying to shoot down the other drone? "

    "No, they're trying to fly the tank"

  20. #466
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    Mostly depending on other peoples, money, territories (including our own for E-loran at Loop ) and US/Russian/ Chinese satellites. Go for Marine Inertial Systems works well for submarines, missiles , and aircraft. It is independent, have one of the others for comparison, avoids shut down or interference.

  21. #467
    Moderator DeV's Avatar
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    Tender for surveys of 19 hospital HLS for AC

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