I'd be careful with adjusting bearing in bulk. You took +3 for all values, shouldn't each be corrected individually? A Mnemonic I use is "Empty Sea, Add Water" to remember: "Map to Compass, add West", "eM T C, A W"
Hi, Bastian! Thanks for the comment! I actually think you can correct them in bulk. Let me try to explain why. When the boat is on course 028°psc, you take the bearing on the reference object by sighting across your boat's compass. Compass error is specific to the direction the boat is pointed at the time you take the readings. So, if your autopilot is on and it's steering the same course when you take your bearings for all the fixes then you should use exactly the same deviation when correcting all of the bearings. However, if you chose to turn the boat away from 028°psc and point the boat at the first reference object before you recorded the bearing and then point the boat at the second reference object and same on the third then your concern is spot on! You would need to use the deviation prescribed for each individual direction. However, I don't think this is what the test questions want. If you did the "turn the boat" approach then the 028°psc would not be relevant to the question. You would be calculating all of the individual deviations after you turned your boat. Another way your concern would be correct is if you were using a hand held compass to sight your bearings. Of course, if you did that, you would need to have a deviation study done using your hand held compass while on your boat and, again, the course of the boat would be irrelevant. So, I don't think that's what they had in mind either. I appreciate you caution, however, and as I say at the end of the video, I encourage you to get out your chart and do your own practice problems to determine if the method would work for you.
@@BFSailing Thanks for the reply! My assumption was to use a handheld compass, but it is also completely theoretical as I use navigation in airplanes and not on the water and there a deviation within about 5 degrees is mostly disregarded anyway. If you can steer within 5 degrees, that's ok and 2 degrees of deviation are mostly academic.
@@bastianhanschitz2839 I'm no longer current but I have a private pilots license, too. I used to fly Cessnas and Archers. Just like in flying, the compass work is obsolete. You're only ever going to use it if you have a total system failure. Most boats on the water have no idea what their compass error is anyway. You just need to know it to pass the test.
@@BFSailing Same in aviation. Cool! I am a full time flight instructor and chief flight instructor training mostly future airline pilots in Germany. In Europe, the system works reversed from the US. You train for the airlines as a pedestrian, get a job at 250hrs and then at some point give back to the community by training the next generation. Most do it freelance while flying, I quit the hamster wheel when my gig went belly up in 2017. Flew 10k hours on A320 and A330.
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I'd be careful with adjusting bearing in bulk. You took +3 for all values, shouldn't each be corrected individually?
A Mnemonic I use is "Empty Sea, Add Water" to remember: "Map to Compass, add West", "eM T C, A W"
Hi, Bastian! Thanks for the comment!
I actually think you can correct them in bulk. Let me try to explain why. When the boat is on course 028°psc, you take the bearing on the reference object by sighting across your boat's compass. Compass error is specific to the direction the boat is pointed at the time you take the readings. So, if your autopilot is on and it's steering the same course when you take your bearings for all the fixes then you should use exactly the same deviation when correcting all of the bearings.
However, if you chose to turn the boat away from 028°psc and point the boat at the first reference object before you recorded the bearing and then point the boat at the second reference object and same on the third then your concern is spot on! You would need to use the deviation prescribed for each individual direction. However, I don't think this is what the test questions want. If you did the "turn the boat" approach then the 028°psc would not be relevant to the question. You would be calculating all of the individual deviations after you turned your boat. Another way your concern would be correct is if you were using a hand held compass to sight your bearings. Of course, if you did that, you would need to have a deviation study done using your hand held compass while on your boat and, again, the course of the boat would be irrelevant. So, I don't think that's what they had in mind either.
I appreciate you caution, however, and as I say at the end of the video, I encourage you to get out your chart and do your own practice problems to determine if the method would work for you.
@@BFSailing Thanks for the reply! My assumption was to use a handheld compass, but it is also completely theoretical as I use navigation in airplanes and not on the water and there a deviation within about 5 degrees is mostly disregarded anyway. If you can steer within 5 degrees, that's ok and 2 degrees of deviation are mostly academic.
@@bastianhanschitz2839 I'm no longer current but I have a private pilots license, too. I used to fly Cessnas and Archers. Just like in flying, the compass work is obsolete. You're only ever going to use it if you have a total system failure. Most boats on the water have no idea what their compass error is anyway. You just need to know it to pass the test.
@@BFSailing Same in aviation.
Cool! I am a full time flight instructor and chief flight instructor training mostly future airline pilots in Germany. In Europe, the system works reversed from the US. You train for the airlines as a pedestrian, get a job at 250hrs and then at some point give back to the community by training the next generation. Most do it freelance while flying, I quit the hamster wheel when my gig went belly up in 2017. Flew 10k hours on A320 and A330.