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998HOUTMAN ABROLHOS - EASTER GROUP998 HOUTMAN ABROLHOS - EASTER GROUP
Evening
Reef
CAUTIONCoral Pinnacles
(see note)
Z E E WI J K
C H A N N E L
Eastern
Islands
DartShoal
CAUTIONCoral Pinnacles
(see note)
CAUTIONCoral Pinnacles
(see note)
RatIsland
Disappearing Island
LittleNorth Island
See Enlargement on Reverse Side
Bankeena
Reef O
bser
vatio
n Are
a
Airs
trip
See DPI Chart Wallabi Group WA 999
M I D D L E
C H A N NE L
Good
Friday
Bay
CAUTIONAquaculture(see note)
CAUTIONAquaculture(see note)
Eastern
Passage
LeoIsland
Campbell Island
Wooded Island
Suomi Island
Fl R 3s 5M
Fl G 3s 5M Fl 5s 10M
Fl R 3s 5M
31’ 31’
32’ 32’
33’ 33’
34’ 34’
35’ 35’
36’ 36’
37’ 37’
38’ 38’
39’ 39’
40’28°
S40'
28°
S
41' 41'
42' 42'
43' 43'
44' 44'
45' 45'
46' 46'
47' 47'
48' 48'
49' 49'
50' 50'
51' 51'
38'
38'
39'
39'
40'
40'
41'
41'
42'
42'
43'
43'
44'
44'
45'113° E
45'113° E
46'
46'
47'
47'
48'
48'
49'
49'
50'
50'
51'
51'
52'
52'
53'
53'
54'
54'
WAWA
SEE RELATED PUBLICATIONS: Notice to Mariners (http://www.transport.wa.gov.au/imarine/coastaldata/), Symbols, Abbreviationsand Terms (INT 1), Tide Tables, Sailing Directions. For surveys beyond this chart refer to RAN Charts AUS 332 and AUS 751.
Notices to Mariners
METRES
DEPTHS
IN
IN
DEPTHS
METRES2
000
1 00
00
1 00
0 M
ET
RE
S3
000
4 00
010
000
ME
TR
ES
7 00
06
000
8 00
09
000
5 00
02 000
1 0000
1 000 ME
TR
ES
3 0004 000
10 000 ME
TR
ES
7 0006 000
8 0009 000
5 000
28° 51' 36" S
113°
37'
30"
E28° 30' 06" S
113°
54'
12"
E
N=
6808
000 N
=68
0800
0
N=
6816
000
N=
6816
000
N=
6824
000
N=
6824
000
N=
6832
000 N
=68
3200
0
N=
6840
000
N=
6840
000
E= 7 60 000
E= 7 60 000
E= 7 68 000
E= 7 68 000
E= 7 76 000
E= 7 76 000
113° 45' E
28°40'
S
113° 45' E
28°40'
S
113° 45' E
28°40'
S
113° 45' E
28°40'
S
113° 45' E
28°40'
S
113° 45' E
28°40'
S
AUSTRALIA - WEST COAST
WESTERN AUSTRALIA
SCALE 1 : 50 000
PlaceLat Long
HAT MHHW MLHW MSL MHLW MLLW LAT
Heights in metres above datum
1.32 1.06 0.92 0.44 0.31 0.110.68
0.590.810.961.22 0.020.220.36
113°47'
114°35'
To find Speed, Distance or Time Interval, draw a line through any two factors, then interpolate forthe unknown factor. eg A distance of 10 nautical miles in 120 minutes means a speed of 5 knots.
1.0 1.5 2 3 4 5 6 7 8 9 10 15 20 30SPEED(Knots)
0.1 0.2 0.4 0.6 1.0 2 4 8 10 15 20 30 40 506DISTANCE(Nautical Miles)
6 10 15 20 30 40 50 60 90 120 180TIME INTERVAL(Minutes)
DEPTHS
HEIGHTS
PROJECTION
SOURCES
NAVIGATION MARKS
LOGARITHMIC NOMOGRAM SPEED - DISTANCE - TIME
IALA Maritime Buoyage System - Region A (Red to Port).
Depths are shown in metres and decimetres, reduced to Sounding Datum, which isapproximately lowest water level.
Heights are shown in metres. Underlined figures are drying heights above SoundingDatum. Overhead clearance heights are above Highest Astronomical Tide. All otherheights are above Mean Higher High Water.
TIDAL INFORMATION AND SOUNDING DATUM
Sounding andTidal Datum°S °E
28°43'
28°47'Geraldton
Rat Island
HOUTMAN ABROLHOSEASTER GROUP
125 EZB1978 250 EZB
1978
500 EZB1978
125EZB1978
125EZB1978
125EZB1978
250 EZB1978
100EZA
99-00
50 EZA99-00
125EZB1978
100EZA
99-00
Reef navigation
Inform others
Know you boat
Safety equipment
Know the weather
BOATING SAFETY
Your boat must be suitable for a long journey in open water. Itmust be seaworthy and have adequate buoyancy.You must carry the appropriate safety equipment and ensure allon board know how to use it.
The Houtman Abrolhos is situated about 40 nautical miles west ofGeraldton and comprises 122 islands clustered into three maingroups. It is an extensive coral reef system that stretches forabout 45 nautical miles north to south. The islands are low lyingand do not present a very good radar picture.
The name Abrolhos is derived from the Portuguese language, andmeans "OPEN YOUR EYES", which is exactly what you need todo when navigating in this area.
The Abrolhos is a hazardous area and requires careful pilotage.The reef systems are steep, rising from relatively deep water, andcan remain unseen until close by. Good visibility is necessary tonavigate through the reefs. Visibility is impared when the sun islow or ahead and when the water is glassy calm.
As swells or waves move in from the open ocean towards theAbrolhos, they are suddenly confronted by a rapidly rising seabed,causing them to break. An important factor in safe reef navigationis the skipper's ability to understand and interpret the conditionssensibly and objectively.
When going out, if a big wave does rear up, get the boat's bow upfast and hit the wave at an angle of about 10 degrees off head on,with plenty of throttle. Back off the throttle when through and workout your approach to the next wave. Look for the lowest point ofthe wave and remember the correct angle of approach.
When coming in through heavy seas, always concentrate onkeeping your boat on the back of the wave, avoid surfing at allcosts, and never get side on in the impact zone.
Be careful when applying power in frothy waves as cavitation andloss of power may occur. If so, back off throttle until cavitationstops and reapply power gradually.
Keep a close eye on the weather and watch out for unexpectedchanges, as the wind can change direction and blow strongly withlittle warning. The islands are low lying and offer little protectionfrom the wind. The coral sand at the Houtman Abrolhos isgenerally very poor holding ground and dragging anchor here canbe dangerous, especially at night. Geraldton Sea Rescue operatea 24 hour service and weather schedules are broadcast on VHFchannel 73.
The weather pattern is unaffected by the land and sea breezes ofthe mainland. During summer, south-easterlies prevail, and areconstantly strong. During winter months, NW-W changes arepreceded by northerlies and light winds.
The Abrolhos is first in the path of any weather moving in from thewest or northwest, and cold and warm fronts may reach theislands 24 hours or more in advance of weather bureau forecastsfor the mainland.
RELIABILITY DIAGRAM 28° 30' 06" S
113°
54'
12"
E
28° 51' 36" S
113°
37'
30"
E
KEY TO SYMBOLS2001400LEOZSR
Year of surveyDistance apart of main sounding lines in metresLead Line depthsEcho Sounder depthsOptical position fixingElectronic position fixingSonar sweptReconnaissance or incomplete survey
AuthoritiesABCD
POSITIONSPositions on this chart are referenced to the Map Grid of Australia, Zone 49,based on the Geocentric Datum of Australia 1994 (GDA94). For GPS use,this approximates WGS84.
1°15'W 2010 (0'E
)
030
060
090
270
300
330
120
150
180
210
240
0 010020
030
040
050
060070
08009027
028
029
030
0
310
320
330340
350
100
110
120
130
140
150
160170180190
200
210
220
230
240
250260
LIGHT CHARACTERISTICS
indicates lit navigation mark
CARDINAL MARKS
North
South
East
Indicatessafe waterto the East
West
Indicatessafe waterto the West
Indicatessafe waterto the North
Indicatessafe waterto the South
F
Fl
Fl( )
Q
LFl
Oc
Iso
= Fixed
= Flashing
= Group-flash
= Quick-flash
= Long-flash
= Occulting
= Isophase
s
m
M
= Period in seconds
= Focal plane height above MHHW
= Luminous range in nautical miles
Colour of light is white unless otherwise stated
NAVIGATION MARKS
Lighthouse, major, minor light
Beacon, port, starboard
Safe water, isolated danger
Spar buoy, port, starboard
Pillar buoy, port, starboard
Mooring buoy, yachting buoy
Lead, front, rear
Special Marks (yellow cross topmark) are not primarily toassist in navigation, but indicate special features.
Y = Yellow Bu = Blue
G = Green R = Red W = White
Universal Transverse Mercator.
CHART AMENDMENTS
Minimum safety equipment you MUST carry;Bilge pump or bailer or bucket,●
Approved anchor and sufficient line,●
Fire extinguisher for boats with inboard motors or liquid or●
gas filled appliances,Suitable sized life jackets: SOLAS, Coastal or Australian●
Standards 1512,Two hand held red flares,●
Two parachute distress rockets,●
Two hand held orange smoke signals or one smoke canister,●
Two-way marine band radio,●
406 MHz EPIRB (AS/NZS 4280.1).●
Responsible skippers carry extra gear. Although not prescribed, agood pair of polaroid sunglasses are essential for navigatingaround the reefs.All safety equipment MUST be maintained in very good conditionand be accessible at all times.
27MHz
VHF
HF
UHF
Channel 88 (EMERGENCY AND CALLING)Channel 91 (Geraldton working channel)Channel 16 (marine)Channel 81 (Abrolhous Repeater)Freq 4125 (Geraldton)Freq 4146 (Abrolhous Repeater)Channel 5
Always inform someone as to where you are going and when youwill return.Geraldton Volunteer Marine Rescue operates in the area coveredby this chart
Call sign: GERALDTON VOLUNTEER SEA RESCUE - VMR670
HOUTMAN ABROLHOSCHART LAYOUT
Wallabi Group WA 999 Side A
Pelsaert Group WA 997 Side A
Easter Group WA 998 Side A
125EZC1983
28° 51' 36" S
113°
37'
30"
E
28° 30' 06" S
113°
54'
12"
E
From the latest information available to Department of Transport, includingRoyal Australian Navy surveys of 1978 and DPI surveys of 1999 and 2000.
Proposed
C
Produced by Cartographic Services, DoT, Western Australia.CROWN COPYRIGHT RESERVED Department of Transport, W.A. 2010.
December 2010, Edition 2.
THE HOUTMAN ABROLHOSThe Houtman Abrolhos and it's surrounding coral reefcommunities form one of Western Australia's most unique marineareas. The islands' environments - both marine and terrestrial -are very fragile, and need the protection of residents and visitorsalike.
The Abrolhos is part of the aquatic heritage of all West Australians- it is our task to ensure that we hand the islands, their fish stocksand their wildlife onto future generations, undamaged and stillproductive.
No facilities or accommodation for visitors are available at theAbrolhos, and there are no sources of freshwater on the islands.Before setting out make sure that you have enough supplies andfreshwater to last the length of your intended visit. Emergencymedical assistance is available from the Silver Chain nurse on RatIsland (Easter Group) between 15 March and 30 June. Contactchannel 16 on VHF.
The Houtman Abrolhos Nature Reserve covers all 122 islands inthe Abrolhos system. As such, by law, all wildlife is protected,and no domestic pets are allowed on vessels or at the islands.Landing is permitted on uninhabited islands, but lighting fires,camping and firearms are prohibited. Please take great care notto disturb nesting seabirds. If you do go ashore, it is better towalk along the shoreline, or well defined paths, rather than acrossthe islands, as you may destroy seabird nesting burrows.
CODE OF CONDUCTWhen you visit the Abrolhos, remember - this is a special placethat needs your protection.
Private property - The residences, jetties and rainwater●
tanks of commercial fishermen on the 22 islands designatedfor their use are private property. You may land on theislands, but you may not use the facilities (including jetties)unless you have written permission on board your boat fromthe owner. You may not stay in fishermen's camps unless theowner is present.If you are unable to use a public mooring, please endeavour●
to anchor away from sensitive marine habitats, particularlycoral and seagrass areas.Take your rubbish away with you - don't drop it in the water.●
Only take enough fish for your personal consumption.●
Take care not to disturb birds and other wildlife on the●
islands.Don't pump bilges in the shallows - the effluent can harm●
marine life.When diving, avoid standing on fragile corals - they break●
easily.
MOORINGS
SHIPWRECKSThe Abrolhos is famous for it's historic shipwrecks, the bestknown of which are the Dutch East India Company vesselsBatavia (1629), on Morning Reef near Beacon Island in theWallabi Group, and the Zeewijk (1727) on Half Moon Reef in thePelsaert Group. So far, a total of seven historic shipwrecks havebeen discovered. Other wrecks are known to exist, but they areyet to be found.
All wrecks, 75 years old or more, are protected under the HistoricShipwrecks Act 1976, which prohibits the removal of artefacts orwilful damage of any sort. By this means, the sites will remainbetter preserved for divers in the future. Refer to WA MaritimeMuseum for further information.
REEF OBSERVATION AREASA major development in managing the marine system of theAbrolhos occurred in 1994 with the introduction of ReefObservation Areas, with one such area being declared in eachisland group, including North Island. Except for the use of rocklobster pots, fishing by both recreational and commercial fishers isprohibited in the Reef Observation Areas. These regulations areintended to allow the recovery of finfish populations towards theiroriginal state, providing an area where divers can observe largefish that are not frightened by their approach.
A number of environmentally-friendly public moorings have beeninstalled at sensitive marine sites and popular diving spots aroundthe Houtman Abrolhos. Refer to the reverse side of this chart forlocations of the Easter Group mooring buoys. Instructions printedon the individual mooring buoys indicates suitability for day orovernight useage.
Department of TransportRoyal Australian NavyAUSLIGOther
R
The information provided on this chart is correct at time of publication. As thisinformation is subject to change, ensure the latest version of the chart is used at alltimes and is kept up-to-date with reference to the following:xxx
Notices to MarinersChanges of a safety or navigational nature will be reflected in Notices to Mariners.Current Notices are available from DoT chart sales offices, approved chart agents andat http://www.transport.wa.gov.au/imarine/coastaldata/.Navigable Waters RegulationsChanges to Navigable Waters Regulations are published in the Western AustralianGovernment Gazette. Regulations for Navigable Waters can also be found athttp://www.slp.wa.gov.au/gazette/gazette.nsf.Marine Protected AreasRefer to Department of Fisheries and Department of Environment and Conservationpublications for the latest information.
CAUTION NOTESCoral Pinnacles
2.608m below tidalBM "Dot 301"
3.360m below tidalBM "RAT 01"
AquacultureMariners are advised that floating and submerged hazards associated with theaquaculture industry may exist in this area.
Examination of aerial photography of the Houtman Abrolhos indicates thatpinnacles exist over areas in which depths are uncertain. Mariners are advised tonavigate with caution and then only in conditions under which reefs may be mostclearly seen.
coral
I N D I A N
O C E A N
11798
3415
0
5.0
13
6
LEGEND
Marsh and swamplandNature Reserve / National ParkRailway, Clearance height, BridgeClearance height, Overhead powerlineRiverMajor roadMinor roadTrackMedical facility, BuildingMean high waterMean low waterDatum markCliffRock shorelineSand drift, Anchoring prohibitedHelipad, GroyneCar parking, Over-beach launchingBoat rampParking for boats / trailersMangroves, Marine farmWater, Fuel, Jetty, Safe anchorageTelephone, Public toiletExposed wreck, Submerged wreckHazardous submerged reefReef which covers and uncoversCoral reef / outcrop, BreakersRock awash, Underwater rockSounding above DatumDanger line2m contour5m contour10m contourDepth in metres and decimetresApproximate contourSubmarine cableAnchorage area, No Anchorage AreaNo Fishing, Pilot boarding locationSpeed limit boundaryWater skiing boundaryProhibited Area boundaryVarious limitsPort Authority / Harbour boundaryRecommended trackOutfallDredged area boundaryRestricted areaMarine Protected Area
33
34
28
27
168
29
32
26
34
34
26
46
28
25
92
55 38
4527
32
21
27
134
2725
23
24
148
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29
24
24
3
71188
3
3156
145
2828
64
84
28
23 29
31
173
179
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28
177
194
29
29
138
17
4773
31
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164
175
35
32
35
115
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13529
29
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15
1
1
13129
178
23
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14216983
28153
151127
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81142
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7282
185
14121
26 3324
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32
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26
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31
33
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31
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18518
32
32
31
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28
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31
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126
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29
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195
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22
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33
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22155
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1182266
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28
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31
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31
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32
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27
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31
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23
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38
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63
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22
32
32
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27
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56
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32
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61
151
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14226102
983
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5117
131
48
4
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131
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35
29
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175
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186
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28
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152
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29
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34
26
27
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91171
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28119
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28
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35
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35
27
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36
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32
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3836
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31
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184
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33
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33
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2458
26
29
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31
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39
40
41
40
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37
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2232
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49 49
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31
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33
33
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41
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61
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88
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55
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52
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35
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135
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87
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44 4454
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23
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24
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29
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28
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1
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29
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39
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38
49
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38
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28
26
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62
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135
133
57
181
38
37
36
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41
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36
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37
29
46
46
47
45
46
45
4447
39
49
42
26
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24
29
2526
62
38
24168
148
153
75
19
25
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68
34
43
37
35
38
46
47
75
189
85
185
86
76
29 93
139
27
34
2432
36 27
28 29202
25
179
26
26
25
33
22
77
72 37
19
4
91
47
48
39
44
1616
207
254826
45
148
19
6988
44
16
19
1915
1
1
5
4
28
27
34
2334
29
79
2738
2
29
839
38
39
128
21
39
89
29
38
9131
99
69
69
33
36
36
36
27
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8
166
37
29
34
119127
33
3840
41
44
4546
46
45
209
201
25
49
89
97
Good
Friday
Bay
Gilbert Island
Serventy Island
Gibson Island
Campbell Island
Tapani Island
Helms Island
Bynoe
Island
White Island
LeoIsland
Joe Smith Island
White Bank
RATISLAND
Roma Island
Little Roma Island
Dry Island
Sandy Island
Wooded Island
Crake Island
Shearwater Island
Keru Island
Island
Suomi
BushbyIsland
Little RatIsland
Pa
ss
ag
e
Ro
ll
a
nd
P a s s a g e
Eastern
Islands
Is
la
nd
Wo
od
ed
StokesIsland
Reef O
bser
vatio
n Are
a
Reef Observation Area
Airs
trip
CAUTION - Coral Pinnacles(see note on reverse side)
Fl G 3s 5M Fl 5s 10M
Fl R 3s 5M
Fl R 3s 5M
SCALE 1:20 000For symbology, tides andgeneral information, referto reverse side of chart.
EASTER GROUP
CAUTION - Aquaculture(see note on reverse side)
CAUTION - Aquaculture(see note on reverse side)
AlexanderIsland
MorleyIsland
Williams Anchorage
Radio mast(conspic)
WARNINGDuring heavy seas, thesouthern entrance to WoodedIsland Passage may close off andbecome unsafe for navigation.
Ea
st
er
n
Pa
ss
ag
e
28°40'
S
113° 50' E
28°40'
S
113° 50' E
39' 39'
40' 40'
41' 41'
42'28°
S42'
28°
S
43' 43'
44' 44'
45' 45'
46' 46'
47'
47'
48'
48'
49'
49'
50'113° E
50'113° E
51'
51'
52'
52'
53'
53'
WAWA
998998
Notices to Mariners METRES
DEPTHS
IN
IN
DEPTHS
METRES2
000
1 00
00
1 00
0 M
ET
RE
S3
000
4 00
05
000
ME
TR
ES
2 0001 000
01 000 M
ET
RE
S3 000
4 0005 000 M
ET
RE
S
28° 46' 54" S
113°
46'
24"
E28° 38' 18" S
113°
53'
06"
E
N=
6816
000
N=
6816
000
N=
6820
000 N
=68
2000
0
N=
6824
000 N
=68
2400
0
N=
6828
000 N
=68
2800
0
E= 7 72 000
E= 7 72 000
E= 7 76 000
E= 7 76 000
E= 7 80 000
E= 7 80 000
HOUTMAN ABROLHOS - EASTER GROUPHOUTMAN ABROLHOS - EASTER GROUP
1°15'W 2010 (0'E
)
030
060
090
270
300
330
120
150
180
210
240
0 010020
030
040
050
060070
08009027
028
029
030
0
310
320
330340
350
100
110
120
130
140
150
160170180190
200
210
220
230
240
250260
113°
46'
24"
E
28° 46' 54" S
113°
53'
06"
E
28° 38' 18" S
C
Produced by Cartographic Services, DoT, Western Australia.CROWN COPYRIGHT RESERVED Department of Transport, W.A. 2010.
December 2010, Edition 2.
R