수도 9개 품종을 이용하여 이면교잡에 의한 36개 조합의 F1 및 F2 세대에서 간장, 수장, 수수에 관여하는 잡종강세 정도와 유전자분포상태를 검정하였던 바 그 결과를 요약하면 다음과 같다. 1. 간장의 잡종강세 정도는 F2 세대보다는 F1 세대에서 크고, SR7796-9, SR7796-44품종이 교배친으로 되어 있는 조합에서는 간장이 긴 쪽으로 현저한 Heterobeltiosis를 나타낸 조합이 많았다. 2. 수장에 있어서도 Heterosis와 Heterobeltiosis의 정도는 F1 세대에서 F2 세대보다 크고, ZLAYN, Arborio 품종이 교친으로 되어 있는 조합에서 수장이 긴 쪽으로 Heterobeltiosis를 나타낸 조합이 많았다. 3. 수수에 있어서도 F1 세대의 Heterosis 정도가 F2 세대보다 현저히 높았고, IR 747B2 -6, SR8234-17, SR8772-29품종이 교배친으로 되어있는 조합에서 Heterobeltiosis가 나타난 조합이 많았다. 4. 간장은 F1 , F2 세대 모두 불완전우성을 나타내었으며, 장간은 단간에 비하여 우성을 나타내었으나IR747B2 -6는 단간이 우성을 나타내었다. 5. 수장은 세대에서 불완전우성을 나타내었으며 품종에 따라 우열의 정도가 달랐다. 6. 수수에 있어서도 F1 , F2 세대 모두 불완전우성을 나타내었고, 대체적으로 수수가 적은 것이 많은 것에 비하여 우성이었다.

The Maneuvering Indices of a ship are the values that decide the quantity of her motion in turning when her rudder is turned over to an angle to the starboard or the port. They consist of two kinds of indices, one of which is called index K and the other, index T. Index K decides a ship's turning ability and index T does the length of time delay of a normal turning motion after her rudder has finished the turn of an ordered angle. Generally, the values of the indices are calculated through some mathematic formulas with figures of her heading degrees recorded at a fixed time intervals during her Z test. The values of the same kind index of a ship appear differently according to the ship'sspeed, trim, rudder angle and loaded condition, etc. In this paper, the author analyzed all the amthematic formulas required to calculate the values of the indices in their forming process and examined them from the point of mathematics and dynamics and also actually figured out the values of maneuvering indices of the M.S. "HANBADA", the training ship of Korea Merchant Marine College through her Z test. The author supposed a case in which two same typed ships as the "HANBADA" in size, shape and conditions were approaching each other in meeting end on situation and each ship turned her rudder hard over to the starboard respectively when they approached to the distance of 3 times as long as the ship's length. The author worked out mathematic formulas calculating forward and transverse ship's motions within the above mentioned situation for the quantative analysis of the collision avoding action to certify whether they are in collision status or not. Applying the calculated values of the maneuvering indices of the "HANBADA" to the motion calculating formulas, the author found out the two ships were passing over each other with the clearing distance o 39m between their port quarters. With the above mentioned examinations and explanations, the author demonstrated that a ship's motion in any collision avoiding action can be shown with quantities of time and distance within reliable limit.istance within reliable limit.