Here I thought 4 10' lines were ample. So far, no issues for any combo around puget sound. BUT, one does need to look at where they sail at. 2 -50' lines with 18" loops are required to go thru the locks to and from puget sound to lake washington. Altho some 20-25' ft ones will work in the small locks, 50 will be needed for the large ones.
She drives me boat,
I drives me dinghy!