Very clear video, however there is no explanation on how you know know the distance travelled? is it time and speed? So 30 minutes at 4 knots would be 2 nautical miles travelled?
Yes, it could be a Distance = Time x Speed calculation. She doesn't say. Or she might be getting it from her GPS? But her explanation of a DR is pretty clear.
@@rabukan5842 If you have a GPS then you already have a fix. But if the GPS stops working, then you have a problem. Dead reckoning is a backup system, very approximate but it will give a reasonably good idea of where you are until you can confirm it with a visual fix, an astro fix, or an electronic fix.
Usually the distance comes from a log, a small impeller in the water which rotates and is calibrated in distance through the water (not over the ground) like a milometer.
A good explanation of “Dead Reckoning”. I would take issue when you introduce “point” when describing your last known position Lat/Long. Decimal should be used habitually not point. Especially on a VHF or other radio transmission. Point, which point? The Lizzard, Nare point? I hope you get the point!?
![Yailin La Mas Viral, @kreizyk.official - Dale 2 (Remix) [Video Oficial]](http://i.ytimg.com/vi/JaYHBzgqz94/mqdefault.jpg)
Very clear explanation.
nice explaination....
Thanks, to everyone at Endeavor. See you again soon.
Very clear video, however there is no explanation on how you know know the distance travelled? is it time and speed? So 30 minutes at 4 knots would be 2 nautical miles travelled?
Yes, it could be a Distance = Time x Speed calculation. She doesn't say. Or she might be getting it from her GPS? But her explanation of a DR is pretty clear.
@@rabukan5842 If you have a GPS then you already have a fix. But if the GPS stops working, then you have a problem. Dead reckoning is a backup system, very approximate but it will give a reasonably good idea of where you are until you can confirm it with a visual fix, an astro fix, or an electronic fix.
Usually the distance comes from a log, a small impeller in the water which rotates and is calibrated in distance through the water (not over the ground) like a milometer.
@@rabukan5842 Time in minutesXSpeed/60, equals Nautical Miles sailed.
A good explanation of “Dead Reckoning”. I would take issue when you introduce “point” when describing your last known position Lat/Long. Decimal should be used habitually not point. Especially on a VHF or other radio transmission. Point, which point? The Lizzard, Nare point? I hope you get the point!?
Thanks for your pointed comment!
i dont understand. who is to say you went in a straight line? Isn't this the most inaccurate thing ever?
You are supposed to sail on a specific heading as closely as you can keep to it. Sailing in random directions is sure to get you totally lost!
Good video and well explained unfortunately the clarity it’s not all that good.