Difference between revisions of "Diving the Cape Peninsula and False Bay/Kalk Bay Harbour Wall"
Revision as of 07:34, 25 August 2009
The dive site Kalk Bay Harbour Wall is in the Kalk Bay area on the False Bay coart of the Cape Peninsula, in 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.
The site is mostly used for commercial diver training and collecting lead sinkers and other fishing gear lost from the harbour wall.
Name "Kalk Bay Harbour Wall"
The dive is off or near the harbour wall at the small commercial fishing harbour at Kalk Bay.
S34°07.787’ E018°26.967' (Shore entry and exit point at south west end of wall)
The site is to the east of the breakwater wall of the Kalk Bay Harbour
This site is in a Marine Protected Area (2009)
Normally done as a shore dive.
Permission is required from the harbour master to dive from the wall, which is the usual arrangement for commercial diver training, as a feature of the site is the jump entry and ladder exit. For this purpose parking may be arranged on the breakwater at the top of the ladder, which is about half way alonh the wall. It is recommended that a handrope be attached to a vehicle to aid divers climbing over the edge, as there are not very good handholds on top of the wall beyond the top of the ladder.
Alternative access is from the rocks outside the harbour, which is in any case a far easier exit. This entry point is at the rocky shore at the end of the harbour wall just below the restaurant. A rock about 8m from the wall has convenient ledges for entry and exit at low tide.
If diving from the shore entry below the restaurant: There is a large gravel parking lot at the entrance to the harbour between the railway line and the harbour buildings: S34:07.780' E018:26.931', clearly visible in the aerial view. Turn left over the level crossing and then right into the parking area. The far end near the buildings is most convenient.
If diving from the breakwater wall: Either arrange to park on the breakwater, which may require getting the chain unlocked, or park in the tarred lower parking lot and carry your kit along the wall.
Public toilets are provided. They are usually open and may be clean. There is a restaurant and cafeteria in the harbour, well known for seafood.
Avoid strong south easterly winds and large swell. This is a commecial fishing harbour and boats entering and leaving are usually on their way to or from fishing grounds, and do not usually spend any time in the diving area to the south east of the harbour. Recreational anglers commonly fish from the harbour wall and divers must keep a lookout for fishing lines. Sinkers and other fishing tackle are frequently found on the bottom. At night this is a popular squid-jigging site.
The site is usually at it's best in winter but there are also occasional opportunities during the rest of the year
A large swell will make exit tricky. If this appears to be too hazardous, it is possible to swim round into the harbour, where there are ladders and a beach, but this should be considered an emergency option, and the risk of injury by a boat is greatly increased. Keep as close to the wall as possible, and exercise due caution when surfacing. Boat crews will not normally be expecting divers in the water.
Maximum depth is approximately 9 to 10m on the sand depending on the tide, and is not much shallower over the reef areas.
Ordovician sandstone , probably of the Peninsula formation, or possibly the underlying Graafwater formation. Strike is about north-west/south-east, more or less perpendicular to the wall, and dip is quite shallow. about 5° to 10°, to the south west.
Vertical faced concrete harbour breakwater wall with sand and low rock reef at the base. Bottom relief is not very high. Low reef of sandstone, patches of pebble and sand at about 8 to 9m, Several concrete blocks and pieces of steel rail near wall. Also other garbage including tangled fishing line and old lures, and usually quite a lot of sinkers. Reef extends to about 100m from wall.
Monofilament fishing line. Some with complete with hook, sinker, bait and fisherman on the harbour wall. Nearby boat traffic. Possibility of Great white sharks in the area.
No special skills required. This is a popular training area for commercial and scientific divers.
Macro photography is all that is worth trying at this site.
If you intend to go far from the wall a compass and SMB are recommended to help avoid the traffic zone at the harbour mouth, and to alert boats to your presence and position.
Wall moderately encrusted, no strong zonation. Reef fairly sparsely encrusted, largely encrusting corallines and urchins. Large shoals of juvenile fish in season, mainly Strepies and Blacktail, but also quite a few Hottentot. Anglers jig for Chokka from the wall at night.
Views of the site from the shore.