Difference between revisions of "Diving the Cape Peninsula and False Bay/Photographer's Reef"
Latest revision as of 10:32, 5 April 2011
The dive site Photographer's Reef also known as JJM Reef is an inshore rocky reef in the Seaforth area of Simon's Town on the False Bay coast of the Cape Peninsula, near Cape Town in the Western Cape province of South Africa.
This site is at a depth which allows long dive times without decompression, is quite small and compact, with a rugged relief and interesting topographical features including several small caverns and swim-throughs, and has a diverse ecology. This is a good site for invertebrate photography. It is near enough to shore and convenient parking for a fit diver to visit from a choice of shore entries, and there are several other small isolated reefs in the vicinity, making the area very suitable for navigation exercises.
This site is in a Marine Protected Area (2004). A permit is required. The site is entirely inside the Boulders Restricted Zone.
The reef is marked on SA Navy charts as "Photographer's Reef". The alternative name "JJM Reef" is from the 1980s and is said to derive from the initials of three divers who 'discovered' the reef as a dive site.
Maximum depth is on sand bottom at about 13m (14m at high tide), top of the reef is about 3m.
Visibility is variable and to some extent correlates with wind direction. If the wind has been blowing from the north west, the visibility is likely to be better than if it is from the south east. 10m would be considered good, but the site is worth diving even when visibility is less, though less than 5m would be considered poor. Visibility is likely to be better in winter than in summer.
Photographer's Reef: — Large rounded granite corestones rising almost vertically from the flat sand bottom. There are narrow and wide crevices, some from 5m below the surface down to the full 13m depth. There is also a small swimthrough cavern at the south west side at the bottom, and another lower one slightly further to the north, also on the west side. A long very deep gully or crack runs magnetic north/south, but is too narrow to swim through without touching the sides below about 6m, and two wider gullies from the east and north east, one leading to a small cavern and the other to a swimthrough. In the middle of the nothern part of the reef is a depression, or bowl, formed where several cracks meet. At the bottom of this is a cavern under a boulder wedged into the gap, and a swimthrough leading to the west side, between the previously mentioned caverns. These features are shown on the detail map.
There are other reefs in the general area, as shown on the map, but these are lower and lack the complexity of Photographer’s Reef.
JJM Junior: — This is a low reef about 30m across the sand to the south of Photographer's. It is about 8.5m deep on top, and is fairly flat, with no spectacular features. The area is similar to Photographer's Reef.
North Photographer's Reef: — A low reef to the north. It is also relatively flat and rises gradually from about 13m on the sand to about 9m at the shallowest point. It is of similar area to Photographer's reef and is about 130m away on a bearing of magnetic north. On the way there are two isolated rocks: the first a long ridge a bit over a metre high with an almost separate end to the south, and the second a low roundish outcrop about 3m diameter. They are slightly to the east of the direct route. They have been named the Exclamation mark and Full stop due to their shapes.
The reef to the south west is Compass Reef, and it is mostly relatively low and mabe up of a number of quite small outcrops, except for a section of fairly high reef at the west side of the area, this extends up from the sand bottom at about 8 to 9m to shallower than 6m. This reef is a landmark on the way to and from Photographer's Reef if it is dived from a shore entry at Pumphouse Gully.
Geology: Granite of the late Pre-Cambrian Peninsula pluton. The rock formations at this site are a "drowned granite tor". A tor is an exposed group of weathered rocks, commonly igneous, usually on top of the bedrock, and formed by weathering of the rock along fracture planes. In the case of the Peninsula pluton, the spheroidal weathering is thought to have occurred largely while the rock was below the surface of the soil, and the feature was later exposed by erosion of the softer saprolite, leaving the boulders stacked in approximately their original positions. At the end of the last ice age, the sea level rose to submerge them. A good example of a similar feature above sea level is the peninsula at Castle Rocks
The site should be diveable if Windmill Beach north entry is OK, and in moderate north westerly winds, but be aware that for a shore dive the long swim back may be a problem in an offshore wind. If the wind is blowing from the north west there may be a surface drift which will set you out to sea from your compass course. Check bearings frequently and adjust course to allow for drift. Use back bearings on a surface swim.
Returning on the bottom or in midwater on a compass bearing is convenient if your air is sufficient. (630 litres was enough for the map-maker to swim all the way back to the beach at Windmill on the bottom in a dry-suit. Your mileage may differ). Make sure you are on the right course, and check that the bottom gets shallower. Divers have been known to swim the wrong way and have had to get a lift back from a fishing boat.
The site is usually at its best in winter but there are also occasional opportunities in autumn and spring.
If a strong south east wind comes up during the dive it may make the exit at Pumphouse Gully difficult, and it may be better to swim round the point to Boulders Beach or to use Windmill north cove.
Tarred and demarcated parking area at the north side of the bottom of Bellevue road, usually with attendants. Security is good when parking attendants are on duty. There is a restaurant at the parking area, and clean toilets in good condition at the ticket office to the penguin sanctuary to the north.
Limited parking at the end of Links Rd. This area has a history of vandalised vehicles and theft, and there is a slight risk of being hit by a golf ball. (The parking area is right next to a green of the Simon's Town golf course, separated by a chain-link fence). There are municipal public toilets and changing rooms on the path to the beach, which are usually shabby and not very clean. They include a fresh water shower which sometimes works.
Photographer's reef is usually considered a boat dive. The site is about 4km from Miller’s Point slipway.
These reefs can also be dived as a shore entry dive from North Windmill Beach or a gully south of the parking area at Penguin Point.
Either of these entry areas can be reached by driving south through Simon’s Town on the M4 (Queens Road), and turning left into Bellevue road at the golf course.
Windmill Beach shore entry: Turn right from Bellevue road into Links road, and park at the end. See Windmill Beach site description for entry details. This parking area is small and not secure.
Penguin Point shore entry: There is a tarred parking area to the left at the bottom of Bellevue road, usually with attendants. Park as near to the entrance as possible. Go through the wooden gate in the low wall on the south side of the lower end of Bellevue road, which leads to a path alongside the garden walls of the adjoining houses. This path goes behind a dense thicket, then curves down to the south of a large rock outcrop just off the shoreline. Mind the penguins — there may be nesting burrows under the grass. There is a cubic concrete pumphouse structure to the south of the small entry gully (known as Pumphouse Gully), and the gully has a tiny beach at low tide. This entry area is well protected from waves, but can be rather shallow at low tide.
When there is a wind from the north west, the wind chop can push water between the rocks to the north of the head of the gully, and this water takes the easy way out through the east opening where you would swim to get in and out. Going out is no problem, but the current can make getting back in a bit of work. If you have enough air left the easy way to deal with this is to go down and pull yourself in against the current by using the rocks and kelp for hand-holds. The gully is shallow, and unlikely to be deeper than about 2m maximum in the part with the current.
Marine life is typical of the area. The reef is heavily encrusted with Common feather stars, Red bait, Red-chested and Mauve sea cucumbers, false corals and encrusting sponges. Areas with dense populations of brachiopods (lamp shells) can be found in some of the deep crevices. Kelp grows on the upper parts of the reef, but it does not reach the surface and is only visible from the surface when you are over the reef. There is a large variety of invertebrates but usually not many big fish.
There are reports of exceptionally large lobster in some of the crevices in the caverns. They are protected, as this site is in a no-take zone.
Also commonly seen in the crevices and exhibiting a certain skill at remaining just out of photographic range, are small numbers of White seacatfish. Very occasionally, the males can be seen mouth brooding marble-sized orange transparent eggs.
At times there may be huge numbers of Red-chested sea cucumbers covering parts of the reef. It seems that the breeding season for these animals is around August, when mind-boggling numbers of tiny juveniles appear at much the same time on many reefs, and coat them with an almost continuous layer of millimetre scale sea cucumbers of a pale pinkish orange. These grow rapidly and by the end of September are near full size at about 2 to 4cm, and make large areas bright red. At times they are so densely packed that there is no space between them.
There are several interesting and fairly spectacular topographic features at Photographer's Reef. These are shown on the detail map, and include:
As the name implies, this is a good photographic site. Macro and Wide angle lenses are likely to be most versatile.
On most dives the visibility will be most conducive to close-up work, involving macro or wide angle shots of the invertebrates, but if the visibility is good, the spectacular topography will provide opportunities for good scenic views, also most likely to work with wide angle and fisheye lenses. Use widely spaced external strobes for anything other than macro work to minimise backscatter, or on a really good day, try natural light.
A swim round the reef will take about 30 minutes at a leisurely pace. Look into the overhang caverns on the western side of the reef, and in the bowl in the middle of the reef. Refer to the detail map for an indication of where the interesting topographical features are located. Note that some of these are at the base of the reef, and others are a few metres above the sand. Most can be found within the depth range of 8 to 12m, so a circumnavigation in this depth band should allow you to see most of the features. Keep a lookout up and down so you dont miss any.
The route shown on the map will take you to almost all the topographical points of interest on a single dive of about half an hour, depending on your speed. It includes penetration of a small cavern and transit of several swim-throughs. The route is intended for shore entry dives, but can be done on boat dives, if you find the start point first, which is the overhang cavern at the south-west corner of the reef, at the sand bottom. Start by swimming into the overhang cavern and follow the back wall to the left, where you will exit in a sand bottomed gully. Turn right and swim through the tunnel under a large rock wedged in the gully, and into the small cavern under the bowl. This cavern has several small openings around the sides, but they are mostly too small for divers, so turn around and retrace your path to the sandy gully. Keep the reef to your right and follow the edge of the reef round to the right (north then east). There is a small overhang just round the corner, then a few small outcrops and a gap to the south. skip this, and go on round the next big boulder, and take the gap between this and the pinnacle a bit further to the north west. This will take you through a gully and a small swimthrough to a short gully opening to the left (north west), onto the sand. Stay deep, and keep the reef to your right again as you go round a moderately high outcrop and into a narrow gully leading back into the reef. At the far end of this gully is a small cavern to the left which is a bit small to enter. Swim up over this cavern and over the ridge to the next gully, which is narrow and leads back south east to the sand. Then swim along the side of the reef with the rock to your right until you reach a very narrow and deep gully which runs right through the reef. It is too narrow to wim through at the bottom, so ascend to where it is wide enough to transit without damaging the reef invertebrates living on the sides, and follow the crack through the reef. It branches to the left about half way, but continue with the main crack until you reach the bowl at the north end. This is a hollow in the reef is almost surrounded by high rocks. The rock at the bottom is the roof of the cavern you went through early in the dive. To return to the starting point, either swim over the pinnacle to the west, or go back part way along the crack to the branch, and follow this over the reef and down, where it ends just south of the overhang cavern.
No site-specific hazards have been reported. The security at the Windmill Beach parking area is problematic. Several vehicles have been broken into at this parking area.
No special skills are required for boat dives. Reasonable fitness, the ability to navigate by compass, and ability to predict air endurance reasonably accurately are required for shore dives.
A light is useful for looking into crevices and overhangs, a compass is essential for shore dives and a surface marker buoy is recommended for shore dives to indicate your presence to boats in the area. Nitrox could be of value to increase your no stop dive time.