Difference between revisions of "Diving the Cape Peninsula and False Bay/Long Beach Simon's Town"
Revision as of 13:30, 3 September 2009
The dive site Long Beach (Simon's Town)is one of the most poular sites in the Simon's Town area on the False bay coast of the cape Peninsula, near Cape Town in the Western Cape province of South Africa. Information is provided which may assist in planning Recreational and Research Scuba diving at this site, and links to photographs of marine organisms that have been found there.
At first glance bland, but careful investigation will reveal interesting and varied life. A surprising variety of fish not commonly found in the region has been sighted here on odd occasions. The place to go when conditions are bad elsewhere. Very popular training site, and great for getting new equipment configurations sorted out
Name "Long Beach"Named for the long stretch of sandy beach.
S34°11.239’ E018°25.574’ (at the “Slipway” shown on the SAN chart). Behind the Simon's Town railway station.
This is in a Marine Protected Area (2009)
Easy shore access in most conditions. Beach entry to gently shelving sand bottom. Park at parking lot between Simon’s Town Station and beach. Turn east off the M4 into (road name) just to the south of the station.
Entry and exit at any point on the beach to the north of the fence at the southern end, which is the border to naval territory. the beach is uniformly shallow shelving sand without reef or other obstacles, and the surf will be trivial in all conditions when it is worth diving.
The parking lot is tarred and generally adequate. There are public toilets and changing rooms of variable condition (frequently vandalised, sporadically maintained, sometimes closed) and fresh water showers which have on occasion been disabled by sawing the handles off the taps.
the site is very well sheltered from Westerly winds and swell, and fairly well sheltered from South Easterlies. Almost always diveable, so popular as a training site and for night dives. The place to go when everywhere else is a mess and you really want to dive. The site is usually at it's best in winter when the wind is not from the east.
Conditions will probably be unsuitable during strong south easterly winds, which mostly occur in summer.
The bottom shelves gradually down from the shore to a depth of 18m at the Simon's Town Harbour mouth, 5m is reasonably close inshore, and about 9m at the maximum distance that the average diver is likely to swim.
The bottom is fine sand and mud, with small patches of coarse shelly sand
Flat sand bottom with occasional lumps of growth on loose rocks, wreckage and other artifacts. There is a pipeline perpendicular to the shoreline near the wall at the south end of the beach, which is visible in the aerial photo, and a wreck of a small steel barge just north of this pipeline. Further south is an obstruction shown on the chart, which is the wreckage of a tubular steel structure and some large concrete footings, possibly the remains of a jetty. Assorted artefacts are strewn randomly around the bay, as a result of centuries of mooring and occasional wreckings. Most are junk, but there will be objects of archaeological value which should not be disturbed. There is the bottom of a wooden yacht hull 220m north east of the barge bearing 057°magnetic. The bottom appears to be copper sheathed and most of the timber has rotted away. The wreck is about 11m long, 2m wide and 1m high, and the bow points towards 160° magnetic. Another wreck at S34°11.172' E018°25.652’ is the remains of twin screw wooden launch, Some bottom structure remains including keel bolts and stern tubes, There are also assorted mooring blocks and chains, some of them probably quite old, and usually heavily encrusted.
To the east is the wreck of a ferroconcrete yacht, which is about 170m bearing 109° magnetic from the seaward end of the pipeline.
The bay is home to the False Bay Yacht Club, so not all boats will give audible warning of their approach. Being hit by the keel of a yacht is to be avoided.
No special skills required. The site is popular for training exercises and night dives, and is recommended as a site to test out new equipment configurations. It may be classed as confined water for some purposes.
The side produces occasional surprises. If you have a camera with you, you get to take the photos.
There are few landmarks, and though it is difficult to actually get lost, a compass is a convenience for keeping some idea of where you are. If you plan to go far from the beach it may be advisable to tow an SMB to let boats know where you are, or at least carry a DSMB in case you need to surface far offshore.
Quite a lot to see on the barge wreck. Little clumps of sessile growth based on the pipeline, red bait, other wreckage and debris, and loose rocks, mostly less than 0.5m diameter. There are extensive areas of sand with weed in the deeper water, some of it attached to the bottom, but a lot apparently loose. In some places there are beds of strap caulerpa, and where red-bait has rooted itself in the sand, little clumps of other organisms gather, including large numbers of Common feather stars. Large numbers of the Warty pleurobranch and Sand slug wander around, and at times there are quite a lot of sea hares. A wide variety of fish have been seen at this site, including several not normally found in the Western Cape. Seals are fairly common, and whales also occasionally come into the bay and have been seen during dives.
Most dives at this site include the barge, and many are more or less at random, or a circuit of some kind based on compass course, as the landmarks are fairly far apart.
1. Compass navigation trail: If you fancy your navigation skills, try this route (see also photo above):
2. A somewhat shorter route for the less experienced or those with less air available:
3. Ferro concrete yacht wreck. Swim to the seaward end of the pipeline, then 170m bearing 109° magnetic. Return on reciprocal bearing, which will take you all the way to the beach.
Calibration leg for distance: To calibrate kick counts swim along the outer pipeline which is 52m long and record the number of kicks required. Swim back and record the number of kicks for the return leg. This should be the same or very similar. Add the two and divide by total distance of 104m to get your distance per kick count. This will vary depending on your speed, trim, posture, equipment, and style of finning, so try to be consistent and fin at a reasonable speed that you will be able to maintain for the longest leg which is about 170m. If in doubt, or for your own information, try swimming the calibration leg at different speeds to see what difference it makes. Do not expect great precision, but you should be able to get consistency within 10% with a little practice. To find the outer pipeline section, start as for the navigation route and find the inner pipeline section and follow it to the west end. Swim about 11m at 095° magnetic to the start of the outer section of pipeline. If you have no idea of your kick distance, work on about one kick count of both feet to the metre and at the end of 11 counts the outer pipeline should be visible. If not, continue for another 5 counts and look again.
Views of the site from the shore.