Stage one of waterproofing the engine. I have made an Oil dip stick clip to hold the stick in place when submerged.
I cut and bent into shape a piece of spring steel from a window wiper to serve as the clip and anchored it using two small hose clamps.
Although a slightly wider piece of spring steel would hold the dip stick in place better, it now takes three to four times the amount of force to pull the stick out so I am happy with that.