0. Introduction to Unit 3 and Navigation.pptx

Introduction to marine navigation including a link to an online website to practice navigation with 3 questions to complete.

1. Welcome to Unit 3

2. Unit 3: Coastlines and Navigation This unit builds on students’ understanding of coastal processes and navigational skills. Including: - Navigation Techniques: Students are introduced to both traditional and modern navigation methods, such as using charts, GPS, and compasses. They learn to plan and execute safe voyages, taking into account tides, weather patterns, and navigational hazards. Legislation and Safety: Students explore relevant maritime legislation, including regulations for boat safety and the requirements for obtaining a Recreational Shipmasters License. - Coastal Processes: Students study wave formation, coastal erosion, and the impact of ocean currents. They also explore the design and function of coastal engineering structures such as groynes and breakwaters. Term 4, 2024 B1 Applied Investigation - Navigational safety and coastal geography Exemplar navigation guide from Townsville to Boigu Island. These sites are rich in online navigational resources and safety information: GBRMPA Nautical Charts : Access Great Barrier Reef charts online and physical copies Queensland Tide Tables : Access tide data through Queensland Tide Tables. Bureau of Meteorology (BOM) : BOM Tides and Weather Data

3. Navigation Navigation is a field of study that focuses on the process of monitoring and controlling the movement of a craft or vehicle from one place to another.

4. Early Navigation Navigation thousands of years ago was just as necessary as it is now – knowing how to navigate the ocean was a necessity for people to trade, to find materials for tools, to search for seasonal foods, for social interactions, and to find reliable sources of water. This knowledge also had to be shared with others and mapping techniques were developed to achieve this.

5. Early Navigation For Aboriginal and Torres Strait Islander people, significant markers such as the direction of sunrise, unusual geological outcrops and stars were often used for navigational purposes Many elements of the dreaming contain oral maps which allow the transfer of this map information They navigated their way across lands and seas of Australia using paths called by some “ songlines ” or “dreaming tracks” which would be based around the creator beings and their formation of the lands and waters – within these oral maps, groups would explain the creation of people, landmarks, rock formations, watering holes, rivers, trees, sky and seas which were used to map the locations or directions of certain places

6. Early Navigation Early Pacific Polynesians used the motion of stars, weather, the position of certain wildlife species, or the size of waves to find the path from one island to another They memorised and recorded their observation through scientific instruments like the Marshall Island Stick Charts of Ocean Swells, which represented major ocean swell patterns and the ways the islands disrupted those patterns

7. The curved sticks represented ocean swells and the straight sticks represented the currents and waves around the island

8. Early Navigation Maritime navigation using scientific instruments such as the mariner’s astrolabe first occurred in the Mediterranean during the Middle Ages – the oldest record of a sea astrolabe is from 1295. By looking through the eyepiece, navigators lined up the rope to determine the ship’s latitude from the height of a particular star or the sun

9. Navigation Timeline

10. Current Navigation Now, most boats use a sounder, which also has an inbuilt chart plotter. A chart plotter is a device that integrates GPS data with an electronic navigational chart. The sounder measures depth and uses sonar technology to identify anything that passes between the transducer (under the boat, sends a sonar beam) and the bottom of the ocean.

11. Chart plotter – uses GPS to detect location and graph map Sounder – uses sonar technology to measure depth and detect movement/masses underneath the boat

12. Current Navigation Technology However, it is important to note that you cannot always rely on technology – it is vital you have a nautical chart with you on board (and that you are able to read this).

13. Numbers in dark blue show the average depth in that area in metres

14. Pink lines are “restricted areas” – fishing boats cannot travel through here, only certain trawlers etc with permission

15. Grey arrows show the recommended track

16. Different shades of colour help you easily see the different depths Shallow Deep Reef Land

17. Reading a Nautical Chart Click the following link: i -Boating : Free Marine Navigation Charts & Fishing Maps (gpsnauticalcharts.com) Click the 3 lines on the top left corner of the page Set the information as below:

18. Reading a Nautical Chart Answer the following questions: Using the compass in the bottom left corner of the screen, estimate how many kilometres off Townsville that Rib Reef is.

19. Reading a Nautical Chart Answer the following questions: You decide to leave the South Townsville boat ramp to travel to North Flinders Reef. You have never been there before, and do not know much about the journey. Using the chart, create a safe passage for yourself through the surrounding reef. Try to find a passage that would be most efficient (one that would get you there safely, but also quicker than other routes). Create a path by describing how to get there using “steps” – for example, Step 1: travel from the South Townsville boat ramp following the channel out towards Magnetic Island for 15km. In your answer, discuss any landmarks you may pass, whether you’ll be in shallow or deep water, how many kms distance it will be and how long you expect the journey to take.

20. Reading a Nautical Chart Answer the following questions: My family and I are travelling from Cape York to Moa Island. We need to make a couple stops along the way – one at Thursday Island, and one at Sassie Island. Propose a plan for how you would travel to these places, how many kms each step would take, and if you would encounter any landmarks (reefs, islands, sand cays, etc.) along the way.

21. Reading a Nautical Chart This work is due via Learning Hub at the end of our Period 3 lesson this Thursday 3 rd October 2024. You can type directly into Learning Hub or upload a file with the 3 questions answered.