the boat.
- place an oar shaft across the tops of the tubes on both marks.
- measure the distance across your boat directly under the oar from inside to inside of the tubes. make sure you find the widest point on the tubes.
- enter this number into the form below in measurement a.
- keep the oar in place for measurement b.
- place your oar in the same place across the top of your tubes as in measurement a.
- measure the distance from the bottom of the oar straight down to your floor.
- enter this number into the form below in measurement b.
- keep the oar in place for measurement c.
- keep 