Forces experienced by a ship - Shearing force, bending moments, hogging and sagging

This video uses diagrams to explain the different forces experienced by a vessel (ship) at sea and in port.
Contents of this video will benefit mariners preparing for exams (written and oral examinations).
Mariners will also benefit by watching the following videos:
Stiffening of ship’s plates:    • Stiffening of ship’s plates - Ship Constru...  
Cargo work numerical (example 1):    • Cargo Work Numerical - Example 1  
Cargo work numerical (example 2):    • Cargo Work Numerical  - Example 2  
Mate’s receipt and letter of indemnity:    • Mate’s receipt, letter of indemnity, and s...  
Bills of lading:    • Bills of lading - functions, types, signin...  
Timber cargo ships:    • Timber Cargo - Carriage of timber cargo on...  
High-density cargoes:    • High density Cargoes - Precautions before ...  
Action if coal cargo temperature is rising:    • Actions if temperature of COAL cargo is ri...  
Cargoes which may liquefy:    • Cargoes which may liquefy - Cargo Work (Ha...  
Timber Code and hazards of timber:    • Timber Code and Hazards of Timber when car...  
Carrying sulphur on ships:    • Carrying Sulphur on ships - Cargo Work (Bu...  
Information provided to Masters of bulk carriers:    • Information provided to Masters of bulk ca...  
Lading and discharging of bulk carriers:    • Loading and discharging bulk cargoes - Car...  
Loading manual of a bulk carrier:    • Loading manual of a bulk carrier - Cargo W...  
Grain Code and Hazards of Grain:    • Grain Code and Hazards of Grain Carriage o...  
Loading Rice on ships:    • Loading Rice on ships - Cargo Work (Bulk C...  
Shifting of grain cargo:    • Action when Grain cargo shifts at sea - Ca...  
Stability Criteria for Grain carriers:    • Stability criteria for Grain carrying ship...  
Stability Criteria for Timber carriers:    • Stability Criteria for Timber Ships - Carg...  
Timber cargo shifts at sea:    • Timber cargo shifts at sea (causes and act...  
Precautions for carrying timber deck cargo:    • Precautions prior to loading Timber as dec...  
Carriage of refrigerated cargoes:    • Carriage of Refrigerated Cargoes by Ships ...  
Rigging Plan:    • Rigging plan - Cargo Work (Mariners)  
Maintenance schedule for lifting gear:    • Maintenance schedule for cargo handling eq...  
Dangerous goods container went overboard:    • Dangerous goods container went overboard -...  
Actions after major breakdown of lifting gear:    • Actions after major breakdown of lifting g...  
Heavy lift procedure:    • Heavy lift procedure on ships - Cargo work...  
False beliefs about hatch cover maintenance:    • False beliefs about hatch cover maintenance  
Procedures to open and close hatch covers:    • Hatch Cover Maintenance  - Procedures to o...  
Maintaining steel landing pads and other parts of the hatch cover:    • Hatch Covers - Maintaining steel landing p...  
Inspection of hatch covers:    • Hatch Cover Maintenance - Inspection of ha...  
Factors affecting water-tightness:    • Hatch Cover Maintenance  - Factors affecti...  
Hatch cover (Heavy Weather Precautions):    • Hatch Cover Maintenance  - Heavy Weather P...  
Safety when working with hatch covers:    • Hatch Cover Maintenance - Safety when work...  
Testing of water-tightness of hatch covers:    • Hatch Cover Maintenance  - Testing water-t...  
Dangerous goods manifest:    • Dangerous Goods Manifest - Layout and Cont...  
Documentation for Dangerous Goods:    • Documentation required for the carriage of...  
Precautions during loading and discharging explosives:    • Precautions during loading and discharging...  
Stowage requirements for dangerous goods in packaged form:    • Stowage requirements for dangerous goods i...  
Stowage of explosives and magazines:    • Stowage of explosives and magazines - Dang...  
Loading containers on a bulk carrier:    • Loading containers on a bulk carrier - Car...  
Cargo change-over from bulk to oil:    • Cargo change-over from bulk to oil (and vi...  
Container stowage planning done ashore:    • How is Container Stowage Planning Done Ash...  
Making a loading plan for containers:    • Making a loading plan for Containers - Con...  
Testing of derricks and lifting appliances:    • Testing of derricks  and lifting appliance...  
IMDG Code:    • The IMDG Code - International Maritime Dan...  
Choice of anchorage area:    • Factors that determine choice of an anchor...  
Preparing anchoring plan:    • Preparing an anchoring plan  
Anchoring process:    • Anchoring - Stopping the vessel, cable use...  
Factors to determine length of anchor cable to be used:    • Factors to consider in determining length ...  
Dragging of anchor:    • Dragging of anchor - determine dragging an...  
Types of drydock:    • Different types of Drydocks used by vessel...  
Emergency towing arrangement:    • Emergency towing arrangement on tankers  
Sub-division load lines:    • What are Sub division load lines?  
Preparation for vessel to enter drydock:    • Preparations for vessel to enter Drydock  
Challenges in high latitude navigation:    • Challenges in high latitude navigation for...  
Navigation of ships in cold climates and freezing conditions:    • Navigation of ships in cold climates and f...  
Detection of ice:    • Detection of ice in high latitudes by mari...  
Ice convoys:    • Ice convoys - Instructions for mariners wh...  
Collecting information about ice:    • Collecting the information about ice for s...  
Navigation in ice:    • Navigating ships in ice - precautionary me...  
Polar Code:    • Polar Code - aims, principles, and feature...  
Navigation in Polar Regions:    • Navigation in Polar Regions - Precautions ...  
Navigation in heavy weather:    • Navigation in heavy weather  
Heavy weather manoeuvring:    • Heavy weather manoeuvring - sychoronous ro...  
Abandon ship in heavy weather:    • Abandon ship in heavy weather - Procedures...