Twilight is the period of incomplete darkness before sunrise and after the sunset. So the morning twilight ends at sunrise, when the upper limb of the sun just appears above the visible horizon, and evening twilight starts at...
Layout A (list)
What is meaning of Interaction between two ships ?
Interaction occurs when a ship comes too close to another ship or too close to a river or canal bank. As ships have increased in size (especially in breadth moulded (Br. Mld)), Interaction has become very important to consider...
What are Errors Of GPS System?
GDOP(Geometric Dilution of Precision) The idea of Geometric DOP is to state how errors in the measurement will affect the final state estimation. Geometric Dilution of Precision Estimate of satellite conditions for a given...