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SeaTalks about Coastal Navigation

Forum - Coastal Navigation

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Student
Matthew Gerdan
Brisbane, Queensland, Australia
Skipper Large Sailboat Level II
Status: Big Time Sailor
Qualified days: 33
Chart PDF NOAA link is no good
Posted 2025, Feb 16 21:08
Does anyone know where I can download a PDF copy of the chart? The NOAA link doesn't work anymore.
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Student
James Bean
Alpharetta, GA, USA
Skipper Small Sailboat Level I
Status: Sailor
Qualified days: 15
Interprolation
Posted 2025, Mar 17 14:41
"So what if at Port Farrow, it is neither high at 0000 or high at 0600 because it is neither Spring nor Neap? What if the high tide is 0900? The tide is midrange. The high tide time then at Rodney Cove would be halfway between the 38 Spring and 18 Neap point. (38+18)/2 = 28 minutes prior to Farrow at 0832. Additionally, you could take a mid-range between 0.2 meters higher and 0.2 meters lower with the answer of zero difference." Why is the tide considered "midrange" between 0000 and 0600? Why not 0300? I don't understand why we use between Neap and Spring tide and note just Neap or just Spring??
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Matthew Osler
New Westminster, BC, Canada
Crew Level 0
Status: Sailor
Qualified days: 0
Pro tip for the test takers
Posted 2025, May 15 03:35
Remember for the test that the coordinates for A and B are always: A @ 41 deg 18 min latitude, 72 deg 57.6 min longitude B @ 41 deg 05 min latitude, 72 deg 49 min longitude.
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Robert Tovell
Westport, ON, Canada
Crew Level 0
Status: Sailor
Qualified days: 0
compass rose 13.45 W variation
Posted 2025, Jul 08 18:28
maybe its my chart copy , but I read the variation as 13 degrees 45 ' W. ... but in the exercise it is stated as 13.45... which we just learned is not the same (minutes vs decimals). It may not make a huge difference for the sake of this exercise , but if we are adjusting for many years, that will make quite a difference. .. thanks!
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Student
Jason Buchheim
Tarpon Springs, FL, USA
Bareboat Charter Master Level V
Status: Really Really Big Time Sailor
Qualified days: 550
Fun Speed Distance Time Online Calculator
Posted 2025, Aug 15 19:05
I got distracted when studying this section and made this online speed, distance, time calculator with lots of fun various units and history display Online Speed Distance Time Calculator: https://cdpn.io/pen/debug/qEOpxmj
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