Knowledge of basic sailing terminology, parts and functions, helm commands, basic sail trim, points of sail, buoyage, seamanship and safety including basic navigation rules to avoid collisions and hazards. Auxiliary power operation is not required.
However, there are some other conditions could cause sores and blisters on the vagina: 1  Genital herpes: Genital herpes is a viral infection caused by the herpes simplex viruses type 1 (HSV-1) or type 2 (HSV-2).  A person infected by genital herpes manifests blisters and sores in the vaginal area.
Causes : Blisters are caused due to skin injury or due to torn skin. When skin is exposed with harsh chemicals like detergent it can lead to formation of blisters. Blood blisters can be caused due to excess of heat like that of sunburn. Sometimes, underlying diseases like impetigo and chickenpox can also cause blisters. Blood blisters can be caused due to constant rubbing of the skin which is often caused for baseball pitchers. It can occur when sharp tool tears the skin. Frostbite can also cause blisters on the skin.