Hydrosphere UK Ltd Complete Products & Services Catalogue

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PEL-6 Peak Intensities in White, Red and Green Sectors PEL-6 Total Subtense Colour 3.5° 5.0° 7.5° 10° 15° 20° M36 Lamp 24V 250W TH Full Intensity M36 Lamp Night Intensity Reduced to 1% M36 Lamp Night Intensity Reduced to 2% M36 Lamp Night Intensity Reduced to 5% M36 Lamp Night Intensity Reduced to 10% M36 Lamp Night Intensity Reduced to 20% M36 Lamp Night Intensity Reduced to 50% M28 Lamp 12V 100W TH Full Intensity W 726,532 356,116 158,273 89,199 39,770 22,470 R 196,164 96,151 42,733 24,084 10,738 6,067 G 174,368 85,468 37,985 21,408 9,545 5,393 W 7,265 3,561 1,582 892 398 225 R 1,962 962 427 241 107 61 G 1,744 855 380 214 95 54 W 14,531 7,122 3,164 1,784 795 449 R 3,923 1,923 854 482 215 121 G 3,487 1,709 759 428 191 108 W 36,327 17,806 7,910 4,460 1,989 1,124 R 9,808 4,808 2,136 1,204 537 303 G 8,718 4,273 1,898 1,070 477 270 W 72,653 35,612 15,820 8,920 3,977 2,247 R 19,616 9,615 4,271 2,408 1,074 607 G 17,437 8,547 3,797 2,141 954 539 W 145,306 71,223 31,640 17,840 7,954 4,494 R 39,233 19,230 8,542 4,817 2,148 1,213 G 34,874 17,094 7,593 4,282 1,909 1,079 W 363,266 178,058 79,100 44,600 19,885 11,235 R 98,082 48,076 21,357 12,042 5,369 3,033 G 87,184 42,734 18,984 10,704 4,772 2,696 W 301,674 147,868 65,719 37,038 16,514 9,330 R 81,452 39,924 17,744 10,000 4,459 2,519 G 72,402 35,488 15,772 8,889 3,963 2,239 Vertical Divergence 2.1° 3.0° 3.9° 4.3° 5.0° 5.6° Boundary Resolution
OSCILLATING BOUNDARY AND SECTOR ANGLES Oscillating Boundary Defi nition Oscillating Boundary is a factory-fi tted option for any PEL Light. It provides up to four additional sectors without any new colours, and proportional indication of lateral movement within a sector. The Oscillating Boundary is best appreciated using a moving model, as shown on the Vega website, www.vega.co.nz. Benefi t The Oscillating Boundary provides early warning of deviation from the centre line, and enables extremely precise navigation. It is ideal for use by large ships moving in very narrow channels, especially when there is adverse wind or tide. Maximum Range Required Distance to Control Point Largest Vessel at Edge of Channel Section Through Control Point Fl R 3s R Alt R/W W Alt G/W G Fl G 3s Fl G G Alt G/ W W Alt R/W R Fl R Figure 6 Signal Format In the oscillating sector the colour oscillates between the colours of the sectors on either side. A complete oscillation occurs every 3 seconds. The oscillation is seen by an observer within the sector as an abrupt change of colour from red to white (for example), and back to red. The period of time that one colour is ivisible (relative to the other colour) is a measure of the closeness of the fi xed sector of that colour. The signal is easily and intuitively grasped by the mariner. A longer red fl ash and a shorter white fl ash means that the mariner is closer to the red sector, and vice versa. Judging the proportion of time in which each colour is displayed is quite straightforward, and the cycle repeats every three seconds. The Oscillating Boundary signal does not change when viewed through binoculars. It is a time-based digital signal, rather than one based on relative lateral displacement. Flash Character It is recommended that a PEL Light with Oscillating Boundary does not have any fl ashing character imposed on the lamp, as this combination could be confusing. A character with a longer on-period (for example, 8.0 seconds) could be tolerated, followed by a brief off-period. This character would help to confi rm the light identity to a mariner when holding position in the white sector, especially if there was signifi cant background lighting at night. Maximum Size of Individual Sectors There is no restriction on size of fi xed To calculate sector angles: A1° = atan(W1/C) A2° = atan(W2/C) A° = A 2° - A1° A1° A2° Distance to control point = C sectors. The maximum width of an oscillating sector is limited to 20% of total subtense, and all oscillating sectors must be the same size. A° By placing the outer fl ashing sectors outside the total subtense of the light, they are masked out and not seen. Partial masking is also possible. See Figure 6. Determining Individual Sector Angles Largest Vessel at Control Point The control point is any convenient point at which the required width of each sector is established. This could be a restricted part of the approach, such as the heads at the harbour entrance or the entrance to a narrow channel. At the control point consider the largest vessel on the extreme edge of its safe manoeuvring area. Take the centre-line of the vessel at this point, and set the outer edge of the oscillating sector. Refer to example above. When the mariner encounters the fi xed red or green sectors (while standing at the centre of the vessel) he has reached the limit of his safe manoeuvring space. Narrow Centre Sector At the centre, allow the smallest practical white sector. Half the width of the largest W1 distance to centre = W 2 centre line of channel Figure 7 vessel when at the control point is a useful starting value. This format gives a very early indication of any deviation from the central sector, as the mariner sees a fl ash of red or green depending on whether the vessel has moved left or right. Flashing Sectors With the Oscillating Boundary system there is the option to use part or all of the two outside fl ashing sectors. Converting Lateral Distances to Angles Use the arc-tangent function to convert measurements of distance from the centreline and distance to control point into angles in degrees. See Figure 7. Sector Light Alignment When selecting individual sector angles, it is a good idea to place one sector edge across a defi ned location, preferably one that can be reached by land. An observer at this location can easily check the alignment of the entire light from time to time. Specifying Sector Angles When specifying individual sector angles, always list by colour and size (in degrees), working from left to right as viewed from the position of the vessel, looking towards the light. 13
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data buoy platforms moorings naviga
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trusted by the industry Our product
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permanent marking signage Maintenan
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fog signals & detectors Visibility
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adar reflectors A range of active-p
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1.24m diameter range Available with
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Page 53 and 54: jetty masts & power systems Folding
Page 55 and 56: guides the way VEGA LIGHTS MARINE A
Page 57 and 58: VLL-43 LED LINEAR LEAD LIGHT A powe
Page 59 and 60: guides the way VLB-2 LED MARINE BEA
Page 61 and 62: data buoy platforms moorings naviga
Page 63 and 64: guides the way VLB-67 LED MARINE BE
Page 65 and 66: Program Capability • 246 flash ch
Page 69 and 70: • Programmable low voltage cutoff
Page 73 and 74: Approved for use as Class A, B, and
Page 77 and 78: Bird Spikes Sealing Stainless steel
Page 79 and 80: guides the way VLL-43 LED LINEAR LE
Page 81 and 82: guides the way VRL-91 UNI-MEGA HIGH
Page 83 and 84: INFORMATION REQUIRED FOR A VRL-91 U
Page 85 and 86: guides the way VLS-46 LED SECTOR PR
Page 87 and 88: • Separate day and night intensit
Page 89 and 90: guides the way VSL-73 PRECISION ALL
Page 91 and 92: INFORMATION REQUIRED FOR A VSL-73 1
Page 93 and 94: guides the way PEL SECTOR LIGHTS PR
Page 95 and 96: for sectored navigation lights. If
Page 97 and 98: The effective intensity of a lamp f
Page 99 and 100: PEL-3 SECTOR LIGHTS • Invented in
Page 101 and 102: PEL-3 Peak Intensities in White, Re
Page 103: MANUFACTURED BY VEGA INDUSTRIES LTD
Page 107 and 108: CALC-2001 & LOGIC INVERTER The CALC
Page 109 and 110: SINGLE PEL SECTOR LIGHT APPLICATION
Page 111 and 112: OSCILLATING BOUNDARY APPLICATIONS M
Page 113 and 114: guides the way VRL-74 LED RANGE LIG
Page 115 and 116: EASY PROGRAMMING The VRL-74 support
Page 117 and 118: guides the way VLB-36 LED OBSTACLE
Page 119 and 120: • Hard wire sync with sync delay
Page 121 and 122: guides the way VLB-92 OMNI-MEGA LON
Page 123 and 124: SPECIFICATIONS Optical Light Source
Page 125 and 126: guides the way VRB-25 MARINE ROTATI
Page 127 and 128: Mfg by Vega Industries Ltd H eriot
Page 133 and 134: All Mobilis data buoys comprise a r
Page 137 and 138: The buoys are constructed using rot
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guides the way VSU-29 GPS SYNC UNIT
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guides the way VEGAWEB MONITORING S
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Use of the VegaWeb monitoring syste
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