Leadership Training Unit 6: Navigation Part 2

2 BWV Walk Leader Training Unit 6 – Navigation Now, here’s a picture familiar to most of you.

3 BWV Walk Leader Training Unit 6 – Navigation Who’d like to come to a party at my place tonight? Melways map 31, reference A11. Who reckons they know the street where I live?

4 BWV Walk Leader Training Unit 6 – Navigation How did you do it? Right. A square! Not a point!

5 BWV Walk Leader Training Unit 6 – Navigation This is called a grid reference. Melways uses a 2-figure grid reference. I think I can safely say this. There’s no-one here who has NEVER been told or used a Melway grid reference. Am I right?

6 BWV Walk Leader Training Unit 6 – Navigation You can use simple 4-figure grid references on a topo map as well, but a 6 figure grid reference is more accurate. Let’s look at how it works.

7 BWV Walk Leader Training Unit 6 – Navigation

8 Here are latitude and longitude numbers. These are geographical coordinates. We do not use them.

9 BWV Walk Leader Training Unit 6 – Navigation Here are the main numbers along the bottom and the vertical grid lines that they correspond to. These are grid coordinates.

10 BWV Walk Leader Training Unit 6 – Navigation They increase from left to right at the rate of one per km. These are EASTINGS.

11 BWV Walk Leader Training Unit 6 – Navigation Here are the main numbers along the left-hand side and the horizontal grid lines that they correspond to. These are grid coordinates.

12 BWV Walk Leader Training Unit 6 – Navigation They increase from bottom to top at the rate of one per km. These are NORTHINGS.

13 BWV Walk Leader Training Unit 6 – Navigation Together, they form squares. Intersecting eastings and northings create the grid squares, and on this map, one grid square is 1 km by 1 km.

14 BWV Walk Leader Training Unit 6 – Navigation Just like with the Melways, we can give a 4-figure grid reference on this map, using just the 2 numbers from the bottom and the left side of the square. The grid coordinates are for the bottom LH corner of the square. The square is east and north from that reference.

15 BWV Walk Leader Training Unit 6 – Navigation Using the map in front of you, find the square 2677, and compare it with your partner.

16 BWV Walk Leader Training Unit 6 – Navigation Now do the same for square 2276

17 BWV Walk Leader Training Unit 6 – Navigation Now do the same for square 2475

18 BWV Walk Leader Training Unit 6 – Navigation Now do Exercise 1 in your workbook. Find the grid square What feature is in the top right-hand corner of the square? Mount Warby. Which waterfall is in the grid square 2978? Jubilee Falls.

19 BWV Walk Leader Training Unit 6 – Navigation How easy is it to find something in a square 1km by 1km, when you’re walking? Let’s make this more accurate.

20 BWV Walk Leader Training Unit 6 – Navigation If we mark 10 divisions along the top or bottom of the square, and 10 divisions along the right or left side of the square, we can use 6 figures for our grid reference. This is part of the romer you all now have!

21 BWV Walk Leader Training Unit 6 – Navigation We can use the romer to create grid references for the point of interest too. Jubilee Falls, at

22 BWV Walk Leader Training Unit 6 – Navigation One tenth of 1 km is 100m, so if we give a 6-figure grid reference, then we have a 100m by 100m square to find the feature in. Is it easier to find something in a square 100m by 100m, than a square 1km by 1 km?

23 BWV Walk Leader Training Unit 6 – Navigation 6-figure grid references are pretty much like saying “accurate to one decimal place” with numbers. The decimal place number is the one tenth division of the Easting and the Northing grid.

24 BWV Walk Leader Training Unit 6 – Navigation There are many ways to remember how to read or do a 6-figure grid reference. The technical way is to remember Eastings then Northings. I suggest along the passage and up the stairs. Other mnemonics?

25 BWV Walk Leader Training Unit 6 – Navigation Now use your workbook for Exercise 2, with the Warby Range map, to find some features using 6-figure grid references, and make some 6-figure grid references for selected features on the map.

26 BWV Walk Leader Training Unit 6 – Navigation a. What is located at GR ?Black Springs b. Find the grid reference for: Mt Bruno Near the centre of the map, “Crestview”, not the name but the facility To the east, intersection of Booth Road and Taylor Track c. Which features are at the following grid references? GR Left hand bend in the road going NorEast GR Small dam GR Ruins North of Jones’s Road Exercise 2 6-Figure Grid Squares

27 BWV Walk Leader Training Unit 6 – Navigation Recap – grid references accomplished! Well done everyone!

28 BWV Walk Leader Training Unit 6 – Navigation To use a map effectively for planning and leading a walk, there’s another piece of information that will make your planning better. Distance! How do we know how far something is on a map? Using maps in detail

29 BWV Walk Leader Training Unit 6 – Navigation We look on the side or bottom of the map for this: Using maps in detail

30 BWV Walk Leader Training Unit 6 – Navigation Now you’ve found it on your map, what does this tell you? Let’s make a list. Using maps in detail

31 BWV Walk Leader Training Unit 6 – Navigation it shows you with a visual scale; it tells you with a ratio scale; the grid on all topo maps is a kilometre square; smaller scale maps have smaller level of detail and cover a bigger area larger scale maps have larger level of detail and cover less area From our discussion

32 BWV Walk Leader Training Unit 6 – Navigation Is this information enough for leading a bushwalk? Possibly, for a very easy walk, but generally not really.

33 BWV Walk Leader Training Unit 6 – Navigation Using your workbook, complete Exercise 3, calculating distance along a straight line or estimating along a track. Avondale Gate to Jones Road cm ÷ 4 = 3.45 km Griffith Track to Black Springs and return via walking track, 2.5 cm ÷ 4 × 2 = 1.25 km

34 BWV Walk Leader Training Unit 6 – Navigation Scale accomplished! Well done everyone!

35 BWV Walk Leader Training Unit 6 – Navigation  We’re here today because we may choose to lead bushwalks for our clubs.  We may start by leading walks which we have already walked before, so we could perhaps not use a map to start with.  Good leaders will use all the tools available to them to do the best that they can.  Good leaders use maps and compasses. Using maps