"according to the navigation rules, what factor should be considered in determining a safe speed?

Visibility conditions.

Explanation:

Safe speed is a speed at which the operator of the boat can take effective action to avoid stops within the distance. To calculate the safe speed visibility conditions (fog, rain, mist, and darkness) should be included. We should also include some other factors given below:

i)Traffic density

ii)Type of vessels in the area

iii)Wind

iv)Water conditions  

laticia draws the diagram below to show earth’s magnetic field.

answer

the arrows to the right of earth should point up.

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.