1. Proportion

• Understand the concept of ratios and proportions in real-life maritime situations.

• Solve problems involving direct and inverse proportion, such as calculating fuel consumption or cargo load distribution.

• Apply proportions to calculate speed, distance, and time relationships in navigation.

2. Variation

• Explain the difference between direct, inverse, and joint variation.

• Solve problems where quantities increase or decrease in relation to each other (e.g., speed vs. time, cargo weight vs. draft).

• Use variation formulas to solve common shipboard calculations.

3. Interpolation

• Understand the concept of interpolation for estimating unknown values within a range of known data points.

• Apply linear interpolation to calculate approximate values like fuel usage over time or distance.

• Use interpolation methods for estimating data in navigational charts and weather predictions.