Mastering Coastal Seamanship
ASA 103 INFOGRAPHIC Basic Coastal Cruising Mastering Coastal Seamanship Visualizing essential concepts from the ASA 103 study guide, from vital VHF communications and engine dynamics to offshore navigation metrics and heavy weather tactics. 1. Fuel Type & Misfueling Checking fuel type before filling a diesel vessel is critical. Pumping gasoline into a diesel tank can cause catastrophic engine failure due to premature ignition and lack of lubrication. ⚠ Signs of Misfueling • Severe Engine Knocking / Pinging • Excessive Black or White Smoke • Sudden Loss of Power • Engine Stalling & Refusal to Restart 2. Latitude vs. Longitude In coastal navigation, 1 minute of latitude always equals 1 nautical mile…


