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SeaTalks about Electronic Navigation and Communications

Forum - Electronic Navigation and Communications

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Student
Robert Neyman
GAINESVILLE, GA, USA
Crew Level 0
Status: Sailor
Qualified days: 0
True wind deviation in 2nd drawing
Posted 2021, Mar 08 21:17
In the diagram accounting for leeway why has the true wind direction changed from north? Does the direction of the boat due to leeway change the true wind direction?
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Student
Onur Aydemir
Dubai, Dubai, United Arab Emirates
Crew Level 0
Status: Sailor
Qualified days: 0
HDG vs COG
Posted 2023, Jun 11 17:02
No doubt that these are great exercises but I suppose HDG and COG values on the display need to be exchanged or alternatively the title and color of lines.
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Student
mark newell
Seattle, WA, USA
Skipper (small keelboat) Level II
Status: Sailor
Qualified days: 28
Calculating TTW with velocity or boat speed?
Posted 2024, May 02 03:55
Appreciating the difference between boat speed and velocity, I'm wondering is 'velocity' is the correct word in the following paragraph about TTW. Since DTW includes an implied direction, "straight line", would "boat speed" be the correct input for determining TTW? "In this case, your sailing distance will be much longer than your DTW. Thus you can not always calculate the time to your destination by simply dividing your DTW by your velocity. Some units...." Feedback very appreciated.
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