Split away! Ultimately the details don’t change the fact that people in boats have been safely getting back to land for probably thousands of years without GPS or charts. There comes a point where navigation must be replaced with seamanship and pilotage regardless of the system in use.
We hope to discover the Scilly Isles next summer, but hopefully a softer landing.
Do you not have a phone?
Was my history wrong >> was he not looking for Indja
Quite a lot that didn't too, though.
Sure, but navigation was almost never the issue.
Thanks. In engineer speak 'marketing hype' then.
Not at all, just a bad choice of words. There’s no hype there are 9 readings in three categories all of which add up to a gimballed compass replacement. Without the additional 6 readings you can’t make a working compass hence the term 9axis compass. The additional information is very useful though and has led to significant enhancements to autopilots as an example.
Just to clarify! Columbus had no means of determining longitude except dead reckoning. Both the method of lunars and the chronometer were 18th-century inventions, resulting from the offering of a vast money prize by the British government. As @Refueler implies, the method of lunar distances was challenging for the average mariner, and was never in widespread use; chronometric longitude was much simpler and more accurate. Cook used the newly invented Lunar method only on his first voyage with considerable success, but he had several advantages - not least having a professional astronomer on board! The observation of the transit of Venus in Tahiti also gave him a very good known longitude. But on his second and third voyages he developed techniques to use lunars and chronometers together and achieved accuracies that were good enough to remain in use until the 20th century. It is noteworthy, and a lesson perhaps for all of those who rely on a single method of navigation, that Cook used ALL the techniques at his command to achieve results much better than any single technique could achieve.
When you’re making charts it’s worth a bit of extra effort. Most of us just need to know roughly where we are to begin pilotage.
Literally what I said. They use the gyros. They don’t need the linear accelerometers because they can measure movement in 3 dimensions so don’t need to sense that part of the equation.
True, but even for pilotage, sanity checking one method against another is sensible. In my case it's usually visual estimates of position against chart plotter.
Being blocked is not the main issue, GPS (and Galileo, Beidou, Glonass etc.) are so low power, they are really easy to spoof.