RedactedNarrative: OPERATOR 1 was operating the vessel and towing his uncle, SKIER 1, who recently purchased the boat.  SKIER 1 was having a difficult time getting up on a single ski due to the lack of recent experience as well as OPERATOR 1 lack of experience towing skiers.  As a result, SKIER 1 was pulled through the water several times, causing his head to submerge as he failed to rise onto the ski.  After several attempts, SKIER 1 sensed something was wrong as he experienced difficulty breathing and began to cough up blood.  SKIER 1 told the others on the boat to help him aboard and then directed them to call 9-1-1 and take him to the Kalispell boat launch where he met with EMS and subsequently transported to Sacred Heart (WA) Hospital in Spokane via Life Flight.