Thursday 20 March 2014

Best Android Apps For Seafarers

Click, try and give comments for improvements to help our fellow seafarers.


1. SeaBook

2. ILO MLC 2006 Checklist

3. Maritime World Ports

4. Celestial Navigation

5. Collision Regulations

6. IALA Buoyage System

7. Cardinal Marks

8. Sun Surveyor 

9. Oil Calculation

10. Star Chart


How To Calculate Fresh Water Allowance

FWA = W / 40 x TPI (English System)
FWA = W / 4 x TPC (Metric System)

How To Calculate Dock Water Allowance



DWA = Fresh Water Allowance x (1025 – Density of Dock Water ) / 25

How To Calculate Parallel Sinkage


PS = w / TPI  (English System)
PS = w / TPC  (Metric System


w = weight loaded

How To Calculate Parallel Rise


PR = w / TPI  (English System)
PR = w / TPC (Metric System)



w = weight discharged

How To Calculate Squat

Squat / Sinkage


Open Waters:
S = Cb x  v2 / 100 (Metric System)
S = Cb x v2 / 30 (English System)

Shallow Waters:
Sinkage/Squat in Open  Waters x 2
 
S = (Cb x  v2 / 100) x 2 (Metric System)
S = (Cb x v2 / 30) x 2 (English System)

V = Ship’s Speed
Cb = Block Coefficient

How To Calculate Wheel Over Position



Example:
Present Course: 300 Degrees
Next Course: 330 Degrees
Course Difference: 30 Degrees
Your Desired Rudder Angle: 10 Degrees
Constant: 12

Solution:
WOP = ((30/10) x 12)/60 Minutes
          = 0.6 Nautical Miles