![]() Using the relationship derived in Unit 4.01 for small angles of heel: The Righting Arm (GZ) changes with inclination of the ship. In this case, the force is equal to the ship's displacement (W F) and the distance is the ship's righting arm (GZ) at each particular angle of heel. Using the cosine equation to solve for the distance X:Ī Righting Moment is created by the ship to keep itself upright. Using an expanded drawing of the triangle from the above diagram: This is only true when the ship has a negligible heel or list.Īs the vessel inclines, the distance between the forces changes.Ī relationship can be developed to solve for the distance between forces for all angles of heel. The Inclining Moment is simply a force acting through some distance. When a ship experiences an Inclining Moment (IM) the vessel will list or heel until the Righting Moment (RM) is equal to the Inclining Moment (RM = IM). Combination of Gravity off-centerline and -GM Ship’s Center of Gravity transversely shifted from centerline.ģ.List: Permanent angle of inclination, caused by: ![]() Heel: Semi-permanent angle of inclination caused by external forces, such as high speed turns, beam winds, and seas. Roll: The action of a vessel involving a recurrent motion, usually caused by wave action. STATE the requirements for conducting the drill.ĭ.ĝESCRIBE how to employ the DCTT to evaluate the drill.Ħ.51ĝESCRIBE the inclining experiment, including it’s mathematical basis, range of validity, and common causes for inaccuracies.Ħ.52 Given a change in a ship's weight distribution, CALCULATE the resulting list using the moment to heel one degree (MH1°) equation.Ħ.53 Given a ship's list, CALCULATE the necessary transverse moment to correct the list, using the moment to heel one degree (MH1°) equation. MEDIA:Ĝlassroom lecture with visual mediaĦ.0ĞVALUATE shipboard stability by analyzing weight and moment considerations (JTI 3.2.1, 6.0, 6.1, 6.2)Ħ.50ğor the MOB-D-6-SF Righting Ship drill:ī.ĝESCRIBE the procedure for conducting the drill.Ĭ. LESSON TOPIC:Ĕ.8 TITLE: RIGHTING SHIP (MOB-D-6-SF)Ĭontact periods allotted this LESSON TOPIC:
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |