E-Loran

[mjcp]

For a yachtsman, ... finding the entrance to Cowes.

It used to be easy - there was a brown thing that came out of it...

But they have painted the ferry red and white now

 

[AntarcticPilot]

It used to be easy - there was a brown thing that came out of it...

But they have painted the ferry red and white now

So does it indicate safe water?

 

[Mark-1]

So does it indicate safe water?View attachment 210106

Which raises the point that moving bouyage is far easier, far more effective and far harder to catch a culprit than spoofing/jamming could ever be.

Maybe we should all fret about that, or does that not provide an excuse to buy cool new tech?

 

[AntarcticPilot]

Which raises the point that moving bouyage is far easier, far more effective and far harder to catch a culprit than spoofing/jamming could ever be.

Maybe we should all fret about that, or does that not provide an excuse to buy cool new tech?

Actually, one of the hardest buoys to spot that I know is Pye End, the safe water buoy marking the way into Hamford Water!

But you make a good point; physical infrastructure is much harder to disrupt than electronic !

 

[14K478]

Actually, one of the hardest buoys to spot that I know is Pye End, the safe water buoy marking the way into Hamford Water!

But you make a good point; physical infrastructure is much harder to disrupt than electronic !

From memory, coming from seaward, line up the lower lighthouse on the beach with the white house with two gables. Before my first singlehanded cruise in 1970 I memorised the directions given by Jack Coote in “East Coast Rivers”.

From Harwich, a mile SSW from Cliff Foot!

 

[AntarcticPilot]

From memory, coming from seaward, line up the lower lighthouse on the beach with the white house with two gables. Before my first singlehanded cruise in 1970 I memorised the directions given by Jack Coote in “East Coast Rivers”.

From Harwich, a mile SSW from Cliff Foot!

Im usually coming from the north, and Pye End disappears against the Naze.

 

[DoubleEnder]

If Uber and Deliveroo went down, due to GPS bad actors, there would be blood in the streets within 12 hours.

 

[S04]

Which raises the point that moving bouyage is far easier, far more effective and far harder to catch a culprit than spoofing/jamming could ever be.

Quite so, this is an extract from an Admiralty paper I found some years ago entitled "NAVWAR – NAVIGATION WARFARE AND GNSS DENIAL/DEGRADATION"

NAVWAR is not a modern concept. In 1918, the first RN raid on Ostend failed due to a successful NAVWAR operation by the German defenders. Rather than simply remove the buoy which marked the approach channel to the port, the Germans moved it more than a mile along the coast.
Approaching at night, with visibility further degraded by their own smokescreen and relying on a purely manual DR and EP, the RN forces were grateful to sight the buoy and made for it to start the assault and HMS BRILLIANT promptly ran aground and was then rammed by the next astern, HMS SIRIUS. With both blockships hard aground in completely the wrong position, being raked by heavy artillery and machine gun fire, the operation was aborted with heavy casualties, having achieved none of its objectives.

 

[Dockhead]

The real threat for us are missiles realistically and those don’t have much dependency on GNSS at all, nor do the bad ones need to be accurate.

Most cruise missiles are GNSS guided. They are hardened against EW with inertial guidance, and some of them have machine vision guidance -- TERCOM and DSMAC -- but it's SOP to defend against missiles with GNSS jamming and other interference.

If by "bad ones" you mean nuclear, then yes. High precision not required. If it comes to that, GNSS will be the least of our concerns, if we're even still around to have concerns.