I just finished a 2 week cruise on my 1988 Catalina 34, my second year with the boat. For the first time, I left with full water and fuel tanks plus gear for our family of 5. I quickly noticed that while motoring at about 7.5 knots, the stern sank to the point that the exhaust port was underwater as were the automatic and manual bilge pump exit ports. All were above water while sailing and when anchored. I realized that I was creating several new through hulls which were not as sturdy or as protected as the normal through hulls. Is this normal and expected or am I playing with a dangerous situation if a hose should fail?