"An accurately set altimeter may be used as an aid in determining height above the glassy water. However, a more effective means is to make the approach and landing near the shoreline so it can be used as a reference for judging height above the water. Another method is to cross the shoreline on final approach at the lowest possible safe altitude so that a height reference is maintained to within a few feet of the water surface. Glassy water landings should always be made power-on, and the need for this type of landing should be recognized in ample time to set up the proper final approach. During the final approach the seaplane should be flown at the best nose-high attitude, using flaps as required or as recommended by the manufacturer. A power setting and pitch attitude should be established that will result in a rate of descent not to exceed 150 feet per minute and at an airspeed approximately 10 knots above stall speed. With a constant power setting and a constant pitch attitude, the airspeed will stabilize, and remain so if no changes are made. The power or pitch should be changed only if the airspeed or rate of descent deviates from that which is desired. Throughout the approach the seaplane performance should be closely monitored by cross-checking the instruments until contact is made with the water. Upon touchdown, back elevator control pressure should be applied as necessary to maintain the same pitch attitude. "