The World's Most Advanced Sailing Education and Sailing Certifications

Determining mid range for current calcs

Forum - Coastal Navigation - Determining mid range for current calcs
Module Content - Sea Talks5
avatar
Student
Conan Hom
Lexington, MA, USA
Crew Level 0
Status: Sailor
Qualified days: 8
Determining mid range for current calcs
Posted 2016, Dec 24 17:21
In the quick questions part of the module Q3... to solve this you said that May 7 was approximately midway between a Neap and a Spring. That makes sense. However in the Sample problem at the end of the module you compared the tidal range. If you did the same for the May 7 problem (and then compared it against the tidal curve tide range data) you would have actually found the range to be rather close to a neap and not mid-range. How do you reconcile the two techniques. If you have tidal range data should you use that rather than date between neap and spring?
Add reply
0 0

Replies

avatar
Administrator
Grant Headifen
Reply 2017, Jan 05 21:57
If you know the predicted range for that day, just apply the high and low of that day to the tide curve.
0 0
avatar
Student
Anton Panferov
San Diego, CA, USA
Skipper (small keelboat) Level I
Status: Sailor
Qualified days: 11
Reply 2021, Nov 22 21:39
I have exactly the same question. Grant, I don’t think you’re answering that question. How do we decide whether some date has a neap or a spring tide? In one place of the course you have an example where you said “this date is between spring and neap tides therefore it’s a mid-range” in another place you said “calculate the range for that day and see how is it comparing to the mean ranges in this location” in one more place you used range at Victoria but then compared it with the mean ranges for Namley Harbour. What is the right way then?
0 0
1 - 2 of 2 replys

Add reply

* - required fields

Please signin first
Add your reply in a positive and constructive manner and tone. Be as specific and clear as possible. Other students will vote your reply up or down depending on its usefulness the clarity. Your comments are always editable.