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Diving the Cape Peninsula and False Bay/SS Umhlali

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The dive site SS Umhlali is an inshore rocky reef with historical wreck in the South Peninsula area on the Atlantic Seaboard of the Cape Peninsula, near Cape Town in the Western Cape province of South Africa.

Understand[edit]

Position[edit]

  • S34°16.435' E18°22.487' (somewhere on the wreckage)


This site is in a Marine Protected Area (2004). A permit is required.


Name[edit]

The "SS Umhlali" is the name of the ship wrecked at this site. The SS Umhlali was a British registered steel cargo and passenger ship of 3380 gross registered tons, built at the Laing yard in Deptford in 1904 and wrecked on Albatross Rock on 15 September 1909. The ship was 106,1 long, 13,2m beam and had a triple expansion steam engine.

Depth[edit]

Maximum depth is about 8 or 9m. and the top of the top of the reef is about 6m.


Topography[edit]

The site is a moderate to low profile sandstone reef with widely scattered wreckage of a steel ship. The wreckage is heavily encrusted with corallines and other mawine growth common in the area and most of the wreckage is very low and not easy to identify. Geology: Ordovicial sandstone of the Peninsula formation. It appears to be a hard rock, quite resistant to erosion, and the bedrock has quite a lerge number of boulders wedged into gaps, with smaller boulders and pebbles in the interstices. There is very little sand, and where it is present, it is possible that it covers specimens of the vessel's cargo which was washedinto a crevice and settled there in the protected zone. Strike can not be determined in site, and dip is very flat.

Conditions[edit]

The site is exposed to swell and wind waves from the south west and north west, so should be dived in ver low swell, and is often good in south easterly winds as long as they are not too strong. The site is reasonably protected from light south easters, but if the swell picks up or the wind swings westerly then the conditions will rapidly become undivable. The site is usually at it's best in spring summer and early autumn, but there are also occasional opportunities in winter. This is an area which sometimes has upwellings, caused by the south east wind, resulting in good visibility and cold water.


Get in[edit]

The site is only accessible by boat, as there are no roads providing reasonable shore access. It is 11.2km fro the slipway at the old crayfish factory north of Scarborough, about 17.1km from the launch site at Kommetjie and 27.5km from Hout Bay harbour slipway.

See[edit][add listing]

West coast rock lobster and the brown arborescent bryozoan are very common at this site
Kelp forests grow all over the site
Heavy epiphyte growth on a kelp stipe

Marine life[edit]

The reef is covered by a moderately dense kelp forest of both Sea bamboo and split fan kelp. The understorey in some places is bushy corallin algae, and the most exposed areas are generally covered by encrusting corallines. There are also large areas of low algal turfs of other kinds. The wreckage and crevices of the reef provide shelter for large numbers of West coast rock lobster, occasional rock crabs, scattered arborescen bryozoans, and some small sponges and colonial ascisians. Some of the relatively exposed surfaces have a dense and strongly adherent growth of larger solitary sea squirts, but these are significantly smaller than the usual red bait pods. These squirts provide a substrate for small seaweeds.

Heavy cast iron bracket
Old bottle with captive glass ball seal
Lead bullets and shot in a crevice under the wreckage
In places where the encrustation has been worn off the structure is more easily recognised

Features[edit]

Wreckage of a ship, and occasionally items of the cargo, which included small arms ammunition, large cartridges loaded with cordite, and mineral water bottles which were sealed with a captive glass ball

Photography[edit]

This is an are where there is not much to photograph unless you are a seaweed enthuiast, and even then, macro will usually give the best results, or if visibility is good and surge low, natural light wide angle shots.

Suggested Routes[edit]

The site is in dense kelp and usually in strong surge. There are no routes known, and your best bet is to move around at random and see what you can find. Look closely, as almost everything is tricky to recognise. the wreckage is astonishingly well camoflaged by the growth.

Stay safe[edit]

Hazards[edit]

Dense kelp may make surface swims difficult, particularly if you are low on air and have no snorkel. Keep enough gas to swim back to the boat underwater if it is anchored. Some of the wreckage has rusted to sharp points and edges. These could be dangerous in a strong surge if you are not careful.

Skills[edit]

No special skills required. The site is also suitable for snorkelling as it is mostly about 7m deep.

Equipment[edit]

No special equipment recommended. Back to Diving the Cape Peninsula and False Bay#South Peninsula

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