Week 10 Topic: The Sailings - Capitol University PDF

Capitol University Cagayan de Oro City COLLEGE OF MARITIME EDUCATION Bachelor of Science in Marine Transportation NAV 003 (TERRESTRIAL AND COASTAL NAVIGATION 2) WEEK 10...

Capitol University Cagayan de Oro City COLLEGE OF MARITIME EDUCATION Bachelor of Science in Marine Transportation NAV 003 (TERRESTRIAL AND COASTAL NAVIGATION 2) WEEK 10 TOPIC: The Sailings STCW A-II/1 F1.C1. Plan and conduct a passage and determine position Competence A-II/1 F1.C1. KUP2. Ability to determine the ship‘s position by use of: KUP.3 dead reckonings, taking into account winds, tides, currents and estimated speed CO1: Use the most appropriate terrestrial method of fixing the ships Course Outcomes position under prevailing circumstances and conditions Learning LO 1.8: Explain the significance of various sailing methods in navigation Outcomes and the different measurements used in navigational “sailings”. 1. The learner reads the materials and watches the supplementary videos on the provided link. Learning Activities 2. Actively participates in the discussion and demonstrates knowledge of the importance of Running fix 3. The learner answers and passes the assessments given by the instructor Overview Plain Sailing and Mercator Sailing - Plain sailing refers to the straightforward application of plane trigonometry in navigation. It allows mariners to solve courses and distances on a flat surface, assuming constant speed and direction. While it simplifies calculations, it doesn't account for the Earth's curvature or variations in magnetic compass readings. Nonetheless, it was historically essential for early navigators. - Mercator sailing, on the other hand, relies on the Mercator projection— a cylindrical map projection commonly used for nautical charts. Advantages include easy plotting of positions, straightforward latitude and longitude determination, and efficient distance measurement. However, it has limitations: great-circle distances are not directly discernible, and extreme 1 latitudes suffer from distortion. Despite these drawbacks, Mercator charts remain fundamental tools for sailors Parallel sailing -refers to a method of traveling along a parallel of latitude from one place to another. Imagine sailing directly westward or eastward along the same latitude—either at a bearing of 270° (true) or 090° (true). Essentially, it's like following a horizontal line around the Earth, staying at the same distance from the equator. Ancient mariners used parallel sailing extensively. Back in the day, they didn't have fancy GPS systems or high-tech gadgets to calculate longitude accurately. So, they sailed along the same latitude until they spotted land. Once land came into view, they adjusted their course according to their destination. It was a practical approach, even if it lacked precision. Great Circle Sailing - Great circle sailing involves solving courses, distances, and points along the shortest path—the great circle—between two points on Earth's surface. Unlike the straight lines of Mercator charts, great circles follow the Earth's curvature. While more complex due to spherical trigonometry, great circle routes significantly reduce voyage distances. They are crucial for long oceanic passages, where efficiency matters. Think of it as finding the quickest way to connect distant ports, even if it means crossing polar regions. - Composite great circle sailing combines elements of both great circle and other sailings. It allows mariners to optimize routes by using great circles where advantageous and transitioning to other methods as needed. This flexibility balances efficiency and practicality, especially when navigating complex coastlines or regions with varying winds and currents. 2 Navigational Charts and Safety - Understanding these sailings is vital for mariners. Nautical charts— essential tools for navigation—depict depths, coastlines, hazards, aids to navigation, and magnetic variations. Whether you're a sailor, ship's officer, or recreational boater, knowing how to interpret charts and apply different sailings ensures safe and efficient passage. Supplementary Videos to Enhance Learning How did the early sailors navigate https://www.youtube.com/watch?v=4DlNhbkPiY the oceans Y Why don’t ship go straight? Great https://www.youtube.com/watch?v=u8A3yAbcM circles cM References 1. https://www.boats.com/position-fixing-made-easy/ 2. https://www.alisonosinski.com/?p=142 3. https://www.practical-sailor.com/safety-seamanship/finding-your-way- testers-look-at-three-types-of-hand-bearing-compasses 4. https://www.usna.edu/Sailing/_files/documents/2019_OSTS_Documents/Navi gation_101_05MAR19.pdf Formative Assessment 1.5: At the end of the learning activities, the student should be able to answer midterm assessment 3: Quiz no.3 Multiple Choice Questions about Sailings and Self assessment check test. Self assessment check test. 1. It refers to a method of traveling along a parallel of latitude from one place to another? A. Plain Sailing B. Parallel Sailing C. Mercator Sailing D. Great Circle Sailing 2. It is a term given to various methods used to determine courses and distances to be steamed when travelling from one geographical position to another. A. Steaming B. Sailings C. Navigating 3 D. Travelling 3. The Mercator projection take its name from the Flemish cartographer known as ? A. Gerardus Mercator B. Gerard Mercs C. Geraldine Mercator D. Gerard Fleming 4. All parallel circles from the equator to the poles are known as? A. parallels of latitudes B. parallels of longitudes C. meridians of latitudes D. meridians of longitudes 5.What is the primary purpose of composite great circle sailing? A) To sail along the shortest route without crossing a specified latitude. B) To follow rhumb line exclusively C) To circumnavigate the globe D) To avoid landmasses 4