What are Sub division load lines?

With the use of pictures, this video explains the purpose of sub-division load lines used on ships.

Mariners should also watch:
Manoeuvring when approaching a pilot station:    • Manoeuvring when approaching a pilot stati...  
Speed when picking up a pilot:    • Speed when picking and disembarking a pilo...  
Manoeuvring in shallow waters:    • Manoeuvring in shallow water - Ship Handling  
Squat and the factors governing it:    • What is Squat and the factors that govern ...  
Practical calculation of a ship’s squat:    • Practical Calculation of a ship's Squat - ...  
Narrow channel effects on ship handling:    • Narrow Channel Effects on Ship Handling  
Interaction between ships in overtaking and head-on situation:    • Interaction between passing ships in an ov...  
Interaction between tug and ship:    • Interaction betweenTugs and Ships  
Turning short around in a narrow channel:    • Turning short around in a narrow channel  
Transverse Thrust:    • Tranverse thrust - effect on single screw,...  
Lateral Thrusters:    • Lateral Thruster - Bow and Stern Thruster  
Girting of tugs:    • Girting of tugs - use of gob line or gob r...  
Windage area and pivot point:    • Windage area and Pivot point  - turning ef...  
Rounding a bend in a narrow channel:    • Rounding a bend in a narrow channel by a s...  
Yawing of a vessel in strong winds:    • When the ship yaws excessively at anchorag...  
Types of tugs:    • Different types of Tugs used in handling s...  

Mate’s receipt and letter of indemnity:    • Mate’s receipt, letter of indemnity, and s...  
Bills of lading:    • Bills of lading - functions, types, signin...  

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  

Students and mariners must watch other videos listed below to enhance knowledge of the topic:
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...  

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...  

Salvage at sea:    • Salvage at sea - maritime law for mariner'...  
Salvage and Towage:    • Difference between salvage and towage - ma...  
SCOPIC clause:    • Scopic clause  - Salvage at sea (Maritime ...  
Letter of protest and sea protest:    • What is the difference between a Letter of...  
Free pratique:    • What is "Free Pratique" or "Radio Pratique...  

Factors deciding the composition of a bridge watch:    • Factors to be taken into account when deci...  
Contents of a pilot card:    • Contents of a Pilot Card used on ships to ...