The overcast day may not seem too appealing unless you think about taking pictures from a boat. On bright days it is necessary to have the sun at your back or the reflection off the water will make picture taking difficult if not impossible. Marine mammals often change their direction of travel without notice and do not always cooperate in getting the boat in the right position. On a dull day their cooperation is not necessary. Again the motor in the picture is to provide an indication of the nearness of the orca pod.