......θα έλεγα λάθος όπως έχω ξαναπεί 15 χρόνια πριν. Σήμερα, δυστυχώς υπάρχουν λίγοι κακοί καπεταναίοι , που δεν έχουν εγκαταλείψει την ναυτιλία χάριν gps. Είναι κακοί διότι οι υπόλοιποι αφενός τώρα τα έχουν κόψει τα μαθήματα της αστροναυτιλίας, αφετέρου δεν ενδιαφέρονται καθόλου ν' ασχοληθούν με τους αριθμούς.. Έτσι , αντί να ευχαριστούν τον καλό καπετάνιο που τους δείχνει να μην ξεμείνουν σε κάποια βλάβη του συστήματος, αφετέρου είναι και κακός για να μην πω άλλη λέξη.
Βέβαια πειμένουμε πάνω από 6 χρόνια να μπει και άλλο σύστημα ώστε να μην εξαρτισσόμεθα από τους Αμερικάνους, από ότι διαβάζω είναι στο δρόμο. Όμως όλα αυτά τα ηλεκτρονικά μέσα, έχουν και αντίμετρα. Διαβάστε παρακάτω σχετικά.
GPS and Shipping: a matter of resilience
Today, as the shipping industry contemplates its move into the age of e-navigation, it is worth
taking a moment to consider our huge and growing dependence on the Global Positioning System
and its galaxy of satellites circling the earth. By 2015 it is expected that there will be some 140
navigational satellites up there, sending signals to the US, Russian, Chinese, Japanese and European
systems. This, it has been suggested, will provide a greater degree of resilience to the users of GPS,
should one system be switched off or degraded by some untoward event.
But will this plethora of navigational sources really provide the reliability we all need for the vast
and increasing number of uses to which satellite signals are being put? Speaking last week at the
Royal Society of Edinburgh’s conference to commemorate the 200th anniversary of Robert
Stevenson’s great Bell Rock lighthouse, Professor David Last, the immediate past president of the
Royal Institute of Navigation, suggested that our increasing reliance on GPS was making modern
societies very vulnerable. Organised in conjunction with Inchcape Shipping Services and the
Northern Lighthouse Board, this was a conference rich in scholarship, and Professor Last’s
intervention provided some very sober food for thought about the robustness and reliability of the
systems we were increasingly relying upon.
In our modern world, it is hard to find an industry that does not depend upon GPS, but there is a
growing concern at our vulnerability. The satellites may be many but their signals are weak –
transmitting less power, says Professor Last, than a car headlight 20,000 km out in space. In recent
incidents, signals reaching ships have been swamped by radio noise caused by solar storms and
there is great concern about the next “solar high” in 2013, when our vulnerabilities will be tested
more than ever before. Additionally, man-made radio interference and intentional jamming have
been identified as serious concerns.
Two years ago an experiment aboard a ship off the Yorkshire coast demonstrated the depth of the
navigator’s dependence upon GPS, when a jammer from ashore effectively paralysed the systems
aboard the test ship, with navigational equipment, radar, engine systems,computers,communications
and compasses affected within a 30-kilometre range of the small jamming device.
An interference with GPS signals in the US naval port of San Diego, Professor Last noted, had
affected all emergency responder systems, hospital equipment and 150 cell-phone sites, besides affecting navigation and computer systems. With such jamming devices being readily available, the
possibility – even probability – of these falling into criminal and even terrorist hands would seem to
be very real. It is said that car criminals have been employing them to block the satellite tracking
devices implanted in expensive cars, and Dutch pilots have been expressing their concern at port
control systems being interfered with by criminal elements, or the sort of electronic menaces who
hack into computers
Professor Last suggested that the use of enhanced Loran - using very high power on low frequencies
can provide a degree of insulation against these current and future concerns and reduce at least
navigational vulnerability substantially. It would, he said, help to keep ships sailing safely, if the
“new stars” which are our satellites, fail us Source: Watchkeeper: BIMCΟ
Βέβαια πειμένουμε πάνω από 6 χρόνια να μπει και άλλο σύστημα ώστε να μην εξαρτισσόμεθα από τους Αμερικάνους, από ότι διαβάζω είναι στο δρόμο. Όμως όλα αυτά τα ηλεκτρονικά μέσα, έχουν και αντίμετρα. Διαβάστε παρακάτω σχετικά.
GPS and Shipping: a matter of resilience
Today, as the shipping industry contemplates its move into the age of e-navigation, it is worth
taking a moment to consider our huge and growing dependence on the Global Positioning System
and its galaxy of satellites circling the earth. By 2015 it is expected that there will be some 140
navigational satellites up there, sending signals to the US, Russian, Chinese, Japanese and European
systems. This, it has been suggested, will provide a greater degree of resilience to the users of GPS,
should one system be switched off or degraded by some untoward event.
But will this plethora of navigational sources really provide the reliability we all need for the vast
and increasing number of uses to which satellite signals are being put? Speaking last week at the
Royal Society of Edinburgh’s conference to commemorate the 200th anniversary of Robert
Stevenson’s great Bell Rock lighthouse, Professor David Last, the immediate past president of the
Royal Institute of Navigation, suggested that our increasing reliance on GPS was making modern
societies very vulnerable. Organised in conjunction with Inchcape Shipping Services and the
Northern Lighthouse Board, this was a conference rich in scholarship, and Professor Last’s
intervention provided some very sober food for thought about the robustness and reliability of the
systems we were increasingly relying upon.
In our modern world, it is hard to find an industry that does not depend upon GPS, but there is a
growing concern at our vulnerability. The satellites may be many but their signals are weak –
transmitting less power, says Professor Last, than a car headlight 20,000 km out in space. In recent
incidents, signals reaching ships have been swamped by radio noise caused by solar storms and
there is great concern about the next “solar high” in 2013, when our vulnerabilities will be tested
more than ever before. Additionally, man-made radio interference and intentional jamming have
been identified as serious concerns.
Two years ago an experiment aboard a ship off the Yorkshire coast demonstrated the depth of the
navigator’s dependence upon GPS, when a jammer from ashore effectively paralysed the systems
aboard the test ship, with navigational equipment, radar, engine systems,computers,communications
and compasses affected within a 30-kilometre range of the small jamming device.
An interference with GPS signals in the US naval port of San Diego, Professor Last noted, had
affected all emergency responder systems, hospital equipment and 150 cell-phone sites, besides affecting navigation and computer systems. With such jamming devices being readily available, the
possibility – even probability – of these falling into criminal and even terrorist hands would seem to
be very real. It is said that car criminals have been employing them to block the satellite tracking
devices implanted in expensive cars, and Dutch pilots have been expressing their concern at port
control systems being interfered with by criminal elements, or the sort of electronic menaces who
hack into computers
Professor Last suggested that the use of enhanced Loran - using very high power on low frequencies
can provide a degree of insulation against these current and future concerns and reduce at least
navigational vulnerability substantially. It would, he said, help to keep ships sailing safely, if the
“new stars” which are our satellites, fail us Source: Watchkeeper: BIMCΟ
Δεν υπάρχουν σχόλια:
Δημοσίευση σχολίου