Which is TRUE of the term negative slip on a...

Which is TRUE of the term negative slip on a...

Question 1 of 2707066636eec28f7522a1c51cfb6

Which is TRUE of the term negative slip on a vessel?

Question 1 of 27070

Q

Which is TRUE of the term negative slip on a vessel?

🔍 Key Concepts

• Propeller slip as the difference between theoretical advance and actual distance traveled • How theoretical speed is calculated from propeller rpm and pitch • What it means when actual ship speed is greater or less than the theoretical propeller speed

💭 Think About

• First, think about how you would calculate the distance a perfect screw (propeller) would move ahead in one revolution if there were no water resistance or loss. • Compare that ideal or theoretical distance per minute with the vessel’s real speed through the water: what does it mean if the real speed is less than the ideal? What if it’s more? • Ask yourself: when mariners say negative slip, are they talking about the ship gaining or losing distance compared to what the propeller ‘should’ be doing mathematically?

✅ Before You Answer

• Be sure you know that slip is about distance/ speed difference, not the effect of the rudder or stopping engines. • Confirm in your mind whether negative in this context means the ship’s actual speed is greater than or less than the calculated propeller speed. • Eliminate any options that describe rudder effect or coasting distance after stopping – those are different concepts from propeller slip.