2. A vessel approaching a blind bend in a river can sound one prolonged blast on the ships' whistle to alert any other vessels to its presence, if another vessel is nearby then they will respond with one prolonged blast on the ships' whistle.
Atrial fibrillation, known as AF or Afib, is an irregular and often very fast heart rate. This may cause symptoms like heart palpitations, fatigue, and shortness of breath. Treating atrial fibrillation is important because it may cause a stroke and negatively impact your quality of life.
Symptoms. Diagnosis and Treatment. The most common symptoms of cystic fibrosis are: 1  Salty-tasting skin, which parents notice when they kiss their child. 2  Frequent coughing, wheezing, or bouts of pneumonia or sinusitis. 3  Difficulty breathing that keeps getting worse.4  Big appetite but poor weight gain. 5  Bulky, smelly, greasy bowel movements.ymptoms. Diagnosis and Treatment. The most common symptoms of cystic fibrosis are: 1  Salty-tasting skin, which parents notice when they kiss their child. 2  Frequent coughing, wheezing, or bouts of pneumonia or sinusitis. 3  Difficulty breathing that keeps getting worse. 4  Big appetite but poor weight gain.