2015 AWSA TECH CONTROLLER MAINTENANCE CLINICSLALOM MODULE

COURSE• TC responsible to ensure nothing was changed from last Survey.• Boat Guides are correct (height out of water), visual on the EC

video.• Turn buoys/gate dia/height: We use min tolerance, but you

need to view from judges tower to ensure buoys are visible and visible for skier.

Dia 20 cm (7.8”) and fastened so that they have of height out of the water (10 cm (3.9”).

• Water/fluid is un-acceptable in a buoy.• Gate buoy must have at least 16” of elastic to allow buoy to be

flexible (move up/down).• Turn buoy from boat C/L tolerance –

approx +/- 4 ½” (11.4cm/0.114m). • Pre-gate tolerance from Gate - approx +/- 1 ft.• Diagonal distance (from one turn buoy to other one)

approx 9”. • The average distance from the calculated C/L for all 6 turn

buoys is a minimum 11.48m

COURSEGate Video• Camera must be 10 feet above water @ 100ft.

(100ft from course C/L). For every addition 10ft away, an additional 1 ft in height is required. This is due to the angle looking in to the gate/skier path at 44deg; not the zoom ratio, that is the 1/3 screen width.

• Gate Video- The gate width must NOT be less than 1/3 of screen width and the screen width for one gate should not be less than 6”x8”? (We need to specify the min size allowed)

• SplashEye Gates go full screen (may have to bump down the resolution on a newer monitor to make sure it physically fills up the screen)

• Gate Video(captured)is required for Class R (World Records)

Gate Camera Location (Visual Setup) (44 deg from shore)(How to find where the gate camera should be prior to survey)Assuming the shoreline is about 170 feet from the course centerline -- typical for a slalom course slightly cocked clockwise in a slalom lake about 300 feet wide -- then you want to find a point on the shoreline, where when you examine your location relative to the G1/G2 gate, and the G3/G4 boat gate, and skier buoy S1, your view has the S1 buoy sitting 2/3-rds of the way through the angle formed by your line of sight to those two gates, as shown in the picture next slide (Dave Clark)

EC Video• EC Video – The far gates (entry/exit) must NOT be less than 1/6

of screen.• Must be able to see the top of boat (pylon thru course).• Camera must be level- can not measure the pylon deviation if

not level (Record Checker computer (pixels) is based on everything straight/square.

• Near Pre-gates are not required to be in the video. Normally just capture the top of the pre-gates.

• Capture Device- Must be set at 30fps and can not be less than resolution of 704x480.

• Capture Device- Verify time is correct (match the scoring program)

• Capture set at high resolution• Verify Playback prior to start of tournament• Locate were someone will be watching EC video at all times.

Towers/Tower Judges• Tower: Ref Rule books for several options, the following are

the requirements that must be meet in all cases.• Tower must be 10 feet (seat surface) above water @ 100ft.

(100ft from course C/L)• For every addition 10ft away, an additional 1 ft in height is

required.

• 2-Gate Judges per gate-ALL cases:• None-Video-2 judges must be at 44deg (must have 4

judges)• Video-Gates -2 judges at any location where the video is

transmitted to. (this can be the skier judges)

Towers/Tower Judges Cont:• 3- Tower Judges• 2- judges between 3-4 on the same side visually

watching with• 1- judge watching boat video being transmitter live

(anywhere) (this can be the CJ, but NOT the 2 skier judges)

• 4- Tower Judges• 2 – judges at 44deg on each end.• Can not put 1 judge at ea 44 deg and transmit the gate

video down to other judge; Not meeting the 2 tower judge location, that are visually watching)

Slalom Towers:Class E: If configuration is acceptable for Class L/R it is also acceptable for Class E.Number judges in the Conf includes boat judge (which is always required)Conf #1: 5 Judges: Class E/L/R: Video gate/boat review is not required for this configuration:

Conf #2: 3 to 4 judges: Class L/R: If the gates video is transmitted to the other tower judge (J4), the extra judge (J2) is not required. If gate video is not transmitted to the other tower judge (J4), the extra judge (J2) is required to review gates only. NOT recommend placing the tower near 2 or 5.

Conf 3: Class E requires 3 judges, the Boat Video is NOT required to be transmitted to shore. Class L/R requires 4 Judges, Boat Video MUST be transmitted to an individual judge who may be the CJ. ( PER IWWF Requirements)

Ropes/handle checker:• All ropes should be pre-stretched and adjusted as close to actual as possible.• Approximately 20 inches of rope stuffed into the line will shorten it one (1) inch.

When stuffing rope pieces into a line, be sure and cut the ends at an angle to lessen the stress rise created by a straight cut.

• If Multiple ropes are being used, they MUST be same make/model for that division.

• 3 different Slalom Lines• Standard – meets the all specification• Mid youth- (7mm) This is like the older 12 std• , meets all specification put is not preferred for anything shorter than 38off.

Optional in Class C, E & L for B1, B2, G1, G2, W6 and above only. • Light Line- (5mm)Does NOT meet IWWF specification; Used only in Class C or

E for B1,B2,G1,G2,W6 and above up to 35ft off. NOTE in Class L.

Ropes/handle checker:Standard rope spec• Weight per foot, maximum = 23 g/m (.250 oz.) • Breaking Load, minimum = 817 kg (1,800 lbs.) • Elongation at 115 kg (250 lbs.) tensile load, 2.6% +/- 0.4%

(Note: Adult skier applies approx. 1000 lbs) • The gauge length shall be set at 5.5 kg (12 lbs.) tensile load

• IWWF states (Request has bee submitted deleting)• Number of Strands = 12 • Minimum Number of Yarns each strand = 60

Towline measurement: Pic showing that the measurement taken from inside 12m loop that goes on the pylon

Ropes/handle checker:• Tournament Handles: must be close to actual (1.5m). There

is a min distance for tournament handle but not for skier supplied handles.

• Handle checker: Mark the max distance from inside of the handle to the loop inside edge. Use a steel tape measure and use a second tape measure to re-verify. (Tape measure have been found to be incorrect).

• Handle Length 150cm, max = 1.525m• Handle checker: use a 2 ½” block to hold handle end.• This is for measuring curved handle.

• Make handle checker in destructible. Use actual weight (#44) in lieu of scale if feasible.

Ropes/handle checker:• Tolerance: The current tolerance are PRE-TOLERANCE, used

by MFG and TC measuring. • We are now using this same tolerance as POST TOLERANCE.

(handles will be checked after skiing)• Handles will stretch a min ¼” after skiing.• Handle- found out-of-tolerance: it is the TC responsibility to

re-verify. Recheck using a tape measure and recheck handle checker to ensure that nothing moved.

• Nat’l Records- Handle will remain attached to rope, but the handle will be checked after returning to doc.

• Ropes will stretch out of tolerance if measured after skiing, wait approx. 45 min – 1 hr for measuring rope/handle for a record.

• AT NO TIME should a HANDLE be checked without another official verifying when reported by the doc starter as being out of tolerance.

10.07 Boat PathThe boat path is intended to be a straight line along the centerline of the course. In no case shall any part of the towboat deviate outside the bounds of the boat gates. The bounds of the boat gates shall be defined by the center of the attach ment point of each buoy.

Maximum deviation of the boat on approach to each buoy/gate is 20 cm (8 inches) toward the side of the skier buoy. The Total Cumulative Deviation (the algebraic sum of the individual deviations) is to be evaluated based on the score for the pass, as follows:Score Limit Score Limit0.25 - 1.00 20 cm 3.25 - 4.00 40 cm1.25 - 2.00 28 cm 4.25 - 5.00 45 cm2.25 - 3.00 35 cm 5.25 - 6.00 49 cm

BOAT: 1) It is required to install a black approx 5 cm wide strip up the middle of the windshield if there’s no C/L on windshield OR2)Two marks or small posts can be mounted on each side of windshield at 20 cm from C/L OR3) RECOMMED installing a small pole (PVC) to pylon approx. 2 ft above pylon: Help in reviewing EC video to determine if boat deviations more than 20 cm.

DRIVERS: Most drivers start out on 1 ball side, starting out with a negative deviation.

Capture Devices• 4 channel DVR is a good device for capture all video (ECOR 960-

4F. Recommend output to a 30” TV/monitor.• (EC, Gates, Boat Video is used) Can be purchased $320.00

• Splasheye- Same but it as auto gate playback.• Splasheye also has an option using EC input to auto track boat

path; Purchased approx. $1000.00- 2000.00.• Computer is standard equip that can be purchased at local

store or from Splasheye.• Loreto Video Program as Slalom Gate Program. This program can

be purchased for approx $2000.00 which includes Slalom Gates, Trick Timer and Video Jump.• Computer is also standard equip that can be purchased at

local stores.

• Next few pic show an example of DVR and Splasheye setup

44 Ch DVR to a 30 in Flat Screen TV (Both Gates, EC and Boat Video

Splasheye –Slalom Gates

Splasheye –Review of Gates

SURVEY• General Module covered some basic, listed below are specific to Slalom Survey• 1st Verification of Site that has not been survived for record tournament, it is

recommended to do a 3 point survey.This takes out any error due to the swimmer moving the buoy, plus the spread sheet will indicate if there was a sighting error.

• AWSA Spread sheets uses all the boat guides to determine the boat C/L. I recommend NOT to input the Pre-Gates until you verify everything, then input the Pre-Gates.If ONE boat guide is out of line, it will shift the boat C/L over, and may show several buoys out of tolerance, it is very IMPORTANT to visually look at a course prior to surveying. I have actually moved boat guides to line up with the others prior to surveying.

• Other Spread sheets just uses the Entry/Exit Gates to determine the boat C/L. If 1 of the 4 gate buoy is off, it will show several interior boat guides off. Again visually verify prior to moving a much of buoys.

• Next slides show example of 2 types of spread sheets, in addition Emmanuel Lion’s Homologation Report as Survey Data Sheet.

SLALOM COURSE ONE/TWO POINT (EDM) SURVEY REDUCTION (V3.50 JUN 2008) Approved by AWSA Tech Comm

Lake Loui SRB BL Tower 21-0-0 (F5) to A183 for Instruc 90 Deg Enter buoy G1 verticaltions. Prt Rng A1..S60 0 Min angle to left, or Instfor this Section. 0 Sec Height here: -2.000

Survey Date: (survey date) Scroll right to Cell AA1 to Plan Corrections -->

Angle and Distance Input Values Sighting Transformed Width Errors from Best FitBuoy --------- ---- -------- -- ------- ---- --- Errors Coordinates Centerline (error is wideTar- Station A EDM Station C -------- ------------- if plus, narrow if minus)get: Deg Min Sec Dist Deg Min Sec OK Value X-Pos Width Ideal +/-Lim Error OK----- ---- ---- --- ----- --------- --- --------- ----- ----- ------ ------ --------P1 14 39 48 168.140 0 0.000 -54.93 1.222 1.150 0.115 0.072 0P2 13 52 22 167.860 0 0.000 -55.04 1.110 1.150 0.115 -0.040 0G1 19 30 50 114.470 0 0.000 0.02 1.284 1.250 0.063 0.034 0G2 18 16 13 113.830 0 0.000 0.03 1.274 1.250 0.063 0.024 0G3 23 57 8 88.540 0 0.000 27.10 1.153 1.150 0.115 0.003 0G4 22 31 30 87.850 0 0.000 27.05 1.149 1.150 0.115 -0.001 0S1 15 55 20 85.200 0 0.000 27.09 11.457 11.500 0.115 -0.043 0S2 47 31 55 58.280 0 0.000 67.97 11.481 11.500 0.115 -0.019 0G5 39 9 32 51.660 0 0.000 68.10 1.091 1.150 0.115 -0.059 0G6 37 2 8 50.460 0 0.000 68.06 1.149 1.150 0.115 -0.001 0G7 91 21 33 29.380 0 0.000 108.96 1.061 1.150 0.115 -0.089 0G8 91 5 43 27.150 0 0.000 108.96 1.178 1.150 0.115 0.028 0S3 88 59 36 16.820 0 0.000 108.98 11.583 11.500 0.115 0.083 0S4 139 21 58 55.910 0 0.000 149.97 11.454 11.500 0.115 -0.046 0G9 147 52 19 49.060 0 0.000 149.90 1.099 1.150 0.115 -0.051 0G10 150 6 3 47.770 0 0.000 149.95 1.183 1.150 0.115 0.033 0G11 164 30 3 85.560 0 0.000 190.94 1.167 1.150 0.115 0.017 0G12 165 58 4 84.820 0 0.000 190.97 1.136 1.150 0.115 -0.014 0S5 172 50 54 82.100 0 0.000 190.97 11.511 11.500 0.115 0.011 0S6 166 30 0 127.690 0 0.000 231.98 11.426 11.500 0.115 -0.074 0G13 170 59 24 124.910 0 0.000 232.00 1.149 1.150 0.115 -0.001 0G14 172 0 12 124.350 0 0.000 231.96 1.124 1.150 0.115 -0.026 0G15 173 20 10 151.310 0 0.000 259.00 1.305 1.250 0.063 0.055 0G16 174 17 17 150.800 0 0.000 258.97 1.256 1.250 0.063 0.006 0P15 176 22 7 205.460 Here 0 0.000 313.95 1.151 1.150 0.115 0.001 0P16 177 0 3 205.250 0 0.000 314.05 1.123 1.150 0.115 -0.027 0TNL 359 0 0 76.000 0 0.000 34.97 35.598 Angle: 45.53 1.53 0TFR 158 16 24 132.000 0 0.000 228.93 30.302 Angle: 45.24 1.24 0A-C ------ ------ ------ ------ ------ ----------- ----- ---- --- ----- --------- --- 0.000 Averages 11.485 0 (Minimum 11.48)

Diagonal Distances and Errors Derived Up and Down Course Distances and Computed ErrorsSeg- ------- ---- ---- -------- -- ----- +/- G2/G4/G6 Side G1/G3/G5 Side Thru Skier Bysment Actual Ideal Error OK Lim Idl Lim Leng Error OK Leng Error OK Leng Error OK----- ------ ----- --------- --- -- ---- ---- -------- ---- -------- ---- --------G-S1 29.397 29.347 0.050 0 .147 27 .135 27.024 0.024 0 27.081 0.081 0 27.070 0.070 0S1-2 46.876 47.011 -0.135 0 .235 41 .205 41.010 0.010 0 41.004 0.004 0 40.880 -0.120 0S2-3 47.048 47.011 0.037 0 .235 41 .205 40.899 -0.101 0 40.855 -0.145 0 41.007 0.007 0S3-4 47.016 47.011 0.005 0 .235 41 .205 40.990 -0.010 0 40.945 -0.055 0 40.986 -0.014 0S4-5 46.995 47.011 -0.016 0 .235 41 .205 41.018 0.018 0 41.039 0.039 0 41.001 0.001 0S5-6 46.987 47.011 -0.024 0 .235 41 .205 40.989 -0.011 0 41.060 0.060 0 41.008 0.008 0S6-G 29.315 29.347 -0.032 0 .147 27 .135 27.010 0.010 0 26.996 -0.004 0 27.007 0.007 0

Left End Pre-Gate 55 .275 55.066 0.066 0 54.944 -0.056 0 NOTE - Measures Calculated Right End Pre-Gate 55 .275 55.087 0.087 0 54.951 -0.049 0 Errs and Limits ---------- Ovrall Course Leng 259 .648 258.94 -0.060 0 258.98 -0.020 0 in this section

30 Sep-11 Gt to 3rd Buoy 109/259ths .115 109.02 0.042 0 108.94 -0.052 0 all in Meters.

2.0 =VERTICAL HT OF INSTRUMENT (M)2.3 =INTERIOR & PREGATE WIDTH

*****STAKEOUT INFO***** *ACTUALLY MEASURED* VERSUS COURSE VS. THEO AXIS DECIMAL HORIZ. SLOPE ANGLES SLOPE ANGLES DEGREES DEGREE

ITEM X1 Y1 X Y ANGLE DIST DIST. DEG MIN SEC ITEM DIST DEG MIN SEC DECIMAL ERRORG1 0.00 1.25 -137.783 100.602 36.1351 170.602 170.613 36 8 6 G1 170.630 36 7 48 36.130 -0.005G2 0.00 -1.25 -137.784 98.102 35.4508 169.141 169.153 35 27 3 G2 169.150 35 26 40 35.444 -0.006G3 27.00 1.15 -110.783 100.487 42.2099 149.567 149.581 42 12 36 G3 149.550 42 13 35 42.226 0.017G4 27.00 -1.15 -110.784 98.187 41.5501 148.033 148.047 41 33 1 G4 148.020 41 33 5 41.551 0.001G5 68.00 1.15 -69.783 100.463 55.2156 122.321 122.337 55 12 56 G5 122.400 55 13 2 55.217 0.002G6 68.00 -1.15 -69.784 98.163 54.5908 120.440 120.456 54 35 27 G6 120.450 54 33 48 54.563 -0.027G7 109.00 1.15 -28.783 100.439 74.0092 104.482 104.501 74 0 33 G7 104.540 74 1 17 74.021 0.012G8 109.00 -1.15 -28.784 98.139 73.6535 102.273 102.293 73 39 13 G8 102.300 73 37 42 73.628 -0.025G9 150.00 1.15 12.217 100.415 96.9368 101.155 101.175 96 56 13 G9 101.180 96 57 24 96.957 0.020G10 150.00 -1.15 12.216 98.115 97.097 98.872 98.893 97 5 49 G10 98.900 97 6 12 97.103 0.006G11 191.00 1.15 53.217 100.391 117.928 113.624 113.642 117 55 41 G11 113.600 117 55 51 117.931 0.003G12 191.00 -1.15 53.216 98.091 118.48 111.596 111.614 118 28 50 G12 111.660 118 28 35 118.476 -0.004G13 232.00 1.15 94.217 100.367 133.19 137.660 137.675 133 11 23 G13 137.680 133 11 18 133.188 -0.001G14 232.00 -1.15 94.216 98.067 133.853 135.992 136.006 133 51 9 G14 136.020 133 51 9 133.853 0.000G15 259.00 1.25 121.217 100.451 140.352 157.430 157.442 140 21 6 G15 157.420 140 20 54 140.348 -0.003G16 259.00 -1.25 121.216 97.951 141.059 155.845 155.858 141 3 33 G16 155.800 141 2 12 141.037 -0.023S1 27.00 -11.50 -110.790 87.837 38.408 141.385 141.399 38 24 29 S1 141.400 38 23 46 38.396 -0.012S2 68.00 11.50 -69.777 110.813 57.8021 130.951 130.967 57 48 7 S2 130.930 57 48 40 57.811 0.009S3 109.00 -11.50 -28.790 87.789 71.8431 92.389 92.411 71 50 35 S3 92.360 71 50 18 71.838 -0.005S4 150.00 11.50 12.223 110.765 96.2972 111.437 111.455 96 17 50 S4 111.430 96 17 12 96.287 -0.011S5 191.00 -11.50 53.210 87.741 121.234 102.615 102.634 121 14 3 S5 102.600 121 13 36 121.227 -0.008S6 232.00 11.50 94.223 110.717 130.399 145.383 145.397 130 23 55 S6 145.460 130 24 30 130.408 0.010

P1PRE -55.00 1.15 -192.783 100.534 27.5416 217.422 217.431 27 32 30 P1PRE 0.000 -27.542P2PRE -55.00 -1.15 -192.784 98.234 27.0014 216.370 216.379 27 0 5 P2PRE 0.000 -27.001P17AFT 314.00 1.15 176.217 100.319 150.347 202.772 202.782 150 20 51 P17AFT 0.000 -150.347P18AFT 314.00 -1.15 176.216 98.019 150.915 201.643 201.653 150 54 55 P18AFT 0.000 -150.915CLVID -250.00 0.00 -387.784 99.498 14.3906 400.345 400.345 14 23 26 CLVID 0.000 -14.391LTWR 50.00 -50.00 -87.813 49.323 29.3223 100.717 100.717 29 19 20 LTWR 0.000 -29.322RTWR 209.00 50.00 71.246 149.230 115.521 165.365 165.365 115 31 15 RTWR 0.000 -115.521SPARE 1.00 1.00 -136.783 100.352 36.2659 169.647 169.659 36 15 57 SPARE 0.000 -36.266SPARE 1.00 1.00 -136.783 100.352 36.2659 169.647 169.659 36 15 57 SPARE 0.000 -36.266SPARE 1.00 1.00 -136.783 100.352 36.2659 169.647 169.659 36 15 57 SPARE 0.000 -36.266SPARE 1.00 1.00 -136.783 100.352 36.2659 169.647 169.659 36 15 57 SPARE 0.000 -36.266SPARE 1.00 1.00 -136.783 100.352 36.2659 169.647 169.659 36 15 57 SPARE 0.000 -36.266

*****CALCUL ANGLE OF SLAL CL VS X AXIS DEG USING LEFT/RIGHT MARKERS*****LM DEG=35.794 LM RAD= 0.625 RM DEG= 143.037 RM RAD= 2.496 DIFF RAD= 1.872LM DIST=169.868 RM DIST= 164.968

TAN= 0.720 INVTAN= 0.624 DEG= 35.761*****SLALOM CL VS X-AXIS DEG= -0.033*****CALCUL COORDINATES OF LEFT ENDGATE CENTER******

X0= -137.784 Y0= 99.352

INSTRUCTIONS: Place two markers were you want the boat center line (approx 25-30M off shore). The left marker will start the entry/exit gate (Critical). The right marker is just for alingment (Not necessary the exit gate).F9 calculates all the required angles/distance and errors/fix.The calculated Xo distance is how far down the baseline the left marker is located.The calculated Yo distance is how far out the left marker is off the baseline.The calculated slalom centerline vs X baseline axis degree: Angle is from the left side of baseline (angle of boat path to baseline).Fix=Left/Right of the waterperson when looking directly at the transit from behind the buoy(not necessary up and down the course).Fix=Towards/Away is the distance that the waterperson needs to go when looking directly at the transit from buoy.

Ed Brazil Slalom Installation Program. This is a program that Ed Brazil wrote that is great for installing a slalom course.

Slalom Check List: (Required for TC Report)1) Tournament name/Code of Competition (AWSA sanction # 15S120R)/Site

Code/GPS #for Site/Type of Tournament (Nat’l/International)/Rounds #/ Cash Prize Tournament or not.

2) Boat Manufacture3) Speed Control Manufacture/software version.4) Arrangement for checking skies (no longer required for safety to check)5) Verified slalom ropes and tournament handles6) Arrangement for checking skiers handles w 44#7) Slalom timing (All buoy) , Speed Control mapped.8) Judges towers arrangement correct9) Gate Video display and recording10)Boat Video Transmitting and recording11)EC Video display correct and recording12)Slalom Course (type)13)Slalom course is within tolerance and survey within 90 days14)Slalom buoy size are correct and visible in sun/shade

RECORDS- SlalomGeneral Module covered some basic for records, listed below are specific to Slalom Records

• Measure handle/rope• Verify boat path is good, prior to submitting.• EC Video of last 2 passes only• Boat Video for last 2 passes for Elite (MM/OM/OW)• Entry Video for last 2 passes for Elite (MM/OM/OW)• Survey• Record application complete• Email TC Chairmen(s)• Upload all data to a file on Adrive, Verify everything is uploaded

and notify TC Chairmen(s) that files have been uploaded.

SLALOM NATL RECORD – BOAT PATH VERIFICATION

All slalom record boat path are examined using a Video Overlay Program developed by Bob Corson (Slalom Record Checker).1) An End Course Video (electronic/digital file recommended) is required with the Entry/Exit gate (with min exit gate

1/6 of screen, 1/3 recommended), buoy/boat level in the video, and captured at 30fps; record application and the survey are required. The EC video is required for all passes, but only the last 2 passes will be examined.

2) The boat C/L is based on the 4 entry/exit gate buoys from the survey data.

3) Load the AVI (EC video) and select starting frame when the boat is at the gates and the last frame when the boat is exiting the gates.

4) Capture approximately 482 to 508 frames for a completed pass.Example would be for 34.2mph @30 fps = 508 frames are captured. 36mph @30fps=482 frames are captured.

5)The boat path (pylon) is examined when the skier is approximately 4 meters in front of the turn buoy to he/she is at the turn buoy.

6) Approximately 9 frames/sample points are taken at the turn buoy (approx. 0.5 m apart) to determine the maximum deviation. These all are dependent on the line length and boat speed.

7) These all are dependent on the line length and boat speed.

8) Maximum deviation at any buoy is 20cm (8 inches). 9) Plus (+) means that the boat is towards the turn buoy; Negative (-) means that the boat is away from the turn buoy.

10) The Total cumulative deviation (algebraic sum of the individual deviations) is based on the score as identified in table of the rule book. Example: Score 3 buoy#1 deviation =+18cm; #2 deviation = -10cm; #3 deviation = -2cm; Total cum dev = +6 (Allowed for score of 3 is +35cm).

11) Boat Position- The following is an example to where the boat is when measuring the deviation. Again, all is dependent on line length and boat speed. The program determines the position based on selecting the line length, the starting and stop position on the entry/exit gates. The following example is not exact distance.34mph/41off: Boat Position#1 sample (first) = 0.5m in front of boat guide.Boat Position#9 sample (last) = 3.5m after boat guide.30mph/38off: Boat Position#1 sample (first) = 0.5m after the boat guide.Boat Position#9 sample (last) = 4.5m after boat guide.

Wakeup, this completes the SLALOM Section