Here's a short note on five of the topics you've mentioned:
1. **Sub-Divisional Load Line**:
The sub-divisional load line is a mark on a ship's hull indicating the maximum safe loading level for the vessel in various conditions, including ballast and bilge water levels. This line is critical in ensuring the vessel's stability and seaworthiness, directly influencing safety at sea. Load lines are set by regulatory bodies and ensure that ships