Figure 15D is a midships view where if you elected and started planking from below the main wale downward and at the same time from the keel upward you may get into a situation where despite your best laid plans there results a gap between the planks. A gap that is too wide for the plank material being used or where two very narrow planks would be required to fill the gap.

Correction Planking

A carefully tapered and fitted correction plank can be used if needed. The correction plank should be somewhere near a standard size plank tapered at both ends and fixed over at its ends onto a bulkhead. This correction plank should not be tapered more than half the normal planks width.