Exam Question

### Introduction
The International Convention on the Control of Harmful Anti-fouling Systems on Ships (AFS Convention), 2001, effectively banned the use of organotin compounds, primarily Tributyltin (TBT), as biocides in antifouling paints. This necessitated the development and widespread adoption of alternative systems. This answer discusses key aspects of these modern alternatives, focusing on hull roughness, foul-release technology, and the critical safety protocols during application.
### (a) Hull Roughness of Different Types of Antifouling Paints
Hull roughness is a critical factor in a vessel's hydrodynamic performance, directly impacting fuel consumption. A small increase in Average Hull Roughness (AHR) can lead to a significant increase in required propulsion power. The type of antifouling (AF) paint applied is a primary determinant of both initial and in-service roughness.