Orals & Written notes | Marine Teacher

Jun 5, 202014 min read

Chapter 11- Stability Calculation

1. On a ship of W 5000t , GM 0.3m, 20t was shifted transversely by 5m. Find the list. Solution: W = 5000t, GM = 0.3m, Weight shifted (w)...

Jun 5, 20202 min read

Which Test must be done before departure onboard ship? (updated June-20)

The following test must be done before departure onboard ship- 1. Controls are to be tested for about 1 or 2 hrs before sailing. If they...

Jun 5, 202011 min read

Chapter 10 - Stability Calculation

1. On a ship of 5000 t displacement , a tank is partly full of DO of RD 0.88. If the moment of inertia of the tank about its centreline...

Jun 4, 20201 min read

What is Smelling the ground?

Smelling the ground means :- This occurs when a ship is nearing an extremely shallow depth of water, such as a shoal. The ship is likely...

Jun 4, 20201 min read

How do you know the data being displayed on my ECDIS is official?

ECDIS is able to determine the status of the chart data being displayed by inspecting the information contained within it. When any part...

Jun 4, 20201 min read

What are ENC’s ?

The IMO Performance Standards for ECDIS defines an ENC as; “The Database, standardized s to content, structure, and format, issued for...

Jun 4, 20201 min read

Why ecdis is a anti grounding tool why not anti collision?

1. Safety Frame/ Watch Vector is also known as ‘Anti Grounding Cone’ or ‘LookAhead Setting’. The setting is based on stopping distance...

Jun 2, 20202 min read

Chapter 9 - Stability Calculation

1. A ship of 10000t displacement has a GM of 0.4m. Calculate the moment of statical stability when she is heeled by 5 degree. Solution:...

Jun 2, 20206 min read

Chapter 8 - Stability Calculation

1. A box shaped vessel of displacement 1640t is 50m long 10m wide and 8m high . Find her KB in SW, if she is one an even keel and...

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