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The dive site '''Rocky Bank''' is an offshore rocky reef in the mouth of False Bay, near Cape Town in the Western Cape province of South Africa.
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{{traveltopic}}
  
<!--why dive here? add short note if the site is special in some way-->
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The dive site '''Rocky Bank''' is an offshore rocky reef in the mouth of False Bay, near [[Cape Town]] in the [[Western Cape]] province of [[South Africa]].
  
==Get in==
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[[Image:Map.png|400px|thumb|Map of the site]]
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==Understand==
===Access===
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<!--[[Image:Map.png|400px|thumb|Map of the site]]-->
This site is only accessible by boat. It is about 24km from Miller's Point slipway, or 37km from Gordon's Bay.
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This site has a different ambience to other Cape Peninsula and False Bay sites, and may have better visibility much of the time.
 +
The reef is spectacularly colourful in artificial light.
  
 
===Position===
 
===Position===
S34°24.73 E18°35.57 (approximately)
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S34°24.93' E18°35.50' (approximately)
  
 
<!--Bearings:  
 
<!--Bearings:  
Line 16: Line 17:
 
<!--Description of location-->
 
<!--Description of location-->
  
This site is not in a Marine Protected Area (2009). A permit is not required.
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This site is not in a Marine Protected Area (2004). A permit is not required.
  
==Understand==
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[[Image:Divers_over_Rocky_Bank_P9205410.JPG|thumb|Divers over Rocky Bank]]
<!--[[Image:Image of whatever the site is named after.jpg|thumb|Caption]]-->
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===Name===
 
===Name===
 
The name "Rocky Bank" is recorded on the SA Navy charts of the area.
 
The name "Rocky Bank" is recorded on the SA Navy charts of the area.
 +
It is also a simple description of the era which is a bank of sandstone, mostly between 25 and 30m deep.
  
 
===Depth===
 
===Depth===
 
The top of the bank is at about 22m. The chart suggests that the area shallower than 30m is about 2 square kilometres.
 
The top of the bank is at about 22m. The chart suggests that the area shallower than 30m is about 2 square kilometres.
 +
Most dives reported have been in the 25 to 30m depth range. It has been difficult to find shallower areas due to the general flatness of the bottom.
  
<!--===Visibility===
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===Visibility===
comment on visibility to be expected-->
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The bank has not been dived extensively, but there are indications that the visbility may be better than average for the False Bay region, as the bottom is rocky, there can be a current, and the water is fairly deep and quite far from the coast, so waves will not easily disturb any sediment, and the current would carry it away rapidly. Visibility has been reported at about 20m.
  
 
===Topography===
 
===Topography===
 
This is a large area, and probably varies considerably from place to place.
 
This is a large area, and probably varies considerably from place to place.
 +
Reports indicate that a large area is moderately flat sandstone reef with low dip angle, so there are steps rather than ridges. However there are areas with profile in the order of 2 to 3 metres gullies and ridges.
  
<!--description of the layout, landmarks and geographical arrangement of the site-->
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Divers have found it difficult to find the shallower areas due to the general flatness of the bottom. There is no general uphill trend discernable, so one finds local rises of a metre or two, then it slopes down again. Southern areas may have higher profile than northern areas, but the sample is not big enough to establish a trend.
  
 
'''Geology:'''
 
'''Geology:'''
Probably sandstones of the Table Mountain series
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Sandstones probably  of the Table Mountain series.
<!--Strike (direction), Dip (direction) if applicable and available-->
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Strike direction is unknown, Dip direction also not known and fairly flat.
  
 
===Conditions===
 
===Conditions===
<!--The site is exposed to (weather/sea condition), so should be dived in (weather/sea condition), and is often good in (weather/sea condition). The site is reasonably protected from (weather/sea condition), but if (weather/sea condition occurs) then (response to weather/sea condition)-->
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The site is exposed to wind and swell from all directions, so should be dived in calm conditions. This may occur at any time of the year. Use the sea state and weather forecasts for planning.
 
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<!--The site is (usually) at it's best in (season1) but there are also occasional opportunities in (season2) and (season3).-->
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<!--This is an area which sometimes has (special circumstance), caused by (condition1), resulting in (condition2)-->
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<!--===Classification==-->
 
<!--===Classification==-->
 
<!--official SANBI reef type classification or equivalent if available -->
 
<!--official SANBI reef type classification or equivalent if available -->
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 +
==Get in==
 +
[[Image:Barred_Fingerfin_at_Rocky_bank_P9205402.JPG|400px|thumb|Typical reef life at Rocky Bank]]
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This site is only accessible by boat. It is about 24km from Miller's Point slipway, or 37km from Gordon's Bay.
  
 
==See==
 
==See==
<!--[[Image:(photo of typical marine organism from site)|thumb|(caption)]]-->
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[[Image:Basket_star_on_sponge_at_Rocky_BankP9205392.JPG|thumb|Basket star on sponge]]
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[[Image:Reef_life_at_Rocky_Bank_P9205346.JPG|thumb|Sponges, ascidians and other encrusting invertebrates at Rocky Bank]]
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[[Image:Fan_hydroid_at_Rocky_Bank_P9205397.JPG|thumb|Fan hydroid at Rocky Bank]]
 
===Marine life===
 
===Marine life===
<!--General description of biota. Substitute “Aquatic life” for fresh water sites-->
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The rocks are encrusted with a large range of colourful sponges, ascidians, soft corals, noble corals hydroids and coralline algae.  
 
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Shoals of small fish, and larger yellowtail swim over the reef, and occasionally sharks will be seen.
<!--[[Image:(photo of typical feature from site)|thumb|(caption)]]-->
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<!--===Features===-->
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<!--other features of note, eg caves, wrecks, anything that a diver might consider a reason to dive the site other than marine life-->
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===Photography===
 
===Photography===
<!--What kind of photography is likely to produce good results-->
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If the visbility is good, almost any equipment should produce good results. Natural light will be blue or green due to the depth, so a strobe or other artificial light will be needed to bring out the bright reds and yellows.
<!--Recommendations for photographic equipment: Lens angle, lighting etc.-->
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===Suggested Routes===
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===Routes===
<!--General description of routes-->
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The site is vast and large areas are not distinguished by any notable features. No routes are known yet, find a place of suitable depth and do a drift dive.
<!--#List of specific route instructions-->
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==Stay safe==
 
==Stay safe==
 
===Hazards===
 
===Hazards===
Cold water possible,. Strong winds may develop over a short time.
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Strong winds may develop over a short time. The site is far out to sea, it may be difficult for the boat to see unmarked divers on the surface.
  
 
===Skills===
 
===Skills===
<!--any special skills required or recommended-->
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The ability to deploy a DSMB is recommended.
  
 
===Equipment===
 
===Equipment===
<!--Equipment additional to what is considered basic for the region, recommended for this site and reasons if not obvious-->
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Take the most powerful light you have to bring out the true colours. The natural light is very blue due to the depth.
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Each group leader should tow an SMB to allow the boat to keep track of their position. Each diver should carry a DSMB or other brightly coloured signalling device that can increase visible height by at least a metre (yellow is considered most visible at sea). A whistle may also be useful in an emergency.
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Back to [[Diving the Cape Peninsula and False Bay]]  
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Back to [[Diving the Cape Peninsula and False Bay#Reefs]]  
  
{{outline}}
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{{usabletopic}}
 +
{{geo|-34.415500|18.591667}}

Latest revision as of 08:05, 18 July 2011

    This article is a travel topic

The dive site Rocky Bank is an offshore rocky reef in the mouth of False Bay, near Cape Town in the Western Cape province of South Africa.


Understand[edit]

This site has a different ambience to other Cape Peninsula and False Bay sites, and may have better visibility much of the time. The reef is spectacularly colourful in artificial light.

Position[edit]

S34°24.93' E18°35.50' (approximately)


This site is not in a Marine Protected Area (2004). A permit is not required.

Divers over Rocky Bank

Name[edit]

The name "Rocky Bank" is recorded on the SA Navy charts of the area. It is also a simple description of the era which is a bank of sandstone, mostly between 25 and 30m deep.

Depth[edit]

The top of the bank is at about 22m. The chart suggests that the area shallower than 30m is about 2 square kilometres. Most dives reported have been in the 25 to 30m depth range. It has been difficult to find shallower areas due to the general flatness of the bottom.

Visibility[edit]

The bank has not been dived extensively, but there are indications that the visbility may be better than average for the False Bay region, as the bottom is rocky, there can be a current, and the water is fairly deep and quite far from the coast, so waves will not easily disturb any sediment, and the current would carry it away rapidly. Visibility has been reported at about 20m.

Topography[edit]

This is a large area, and probably varies considerably from place to place. Reports indicate that a large area is moderately flat sandstone reef with low dip angle, so there are steps rather than ridges. However there are areas with profile in the order of 2 to 3 metres gullies and ridges.

Divers have found it difficult to find the shallower areas due to the general flatness of the bottom. There is no general uphill trend discernable, so one finds local rises of a metre or two, then it slopes down again. Southern areas may have higher profile than northern areas, but the sample is not big enough to establish a trend.

Geology: Sandstones probably of the Table Mountain series. Strike direction is unknown, Dip direction also not known and fairly flat.

Conditions[edit]

The site is exposed to wind and swell from all directions, so should be dived in calm conditions. This may occur at any time of the year. Use the sea state and weather forecasts for planning.


Get in[edit]

Typical reef life at Rocky Bank

This site is only accessible by boat. It is about 24km from Miller's Point slipway, or 37km from Gordon's Bay.

See[edit][add listing]

Basket star on sponge
Sponges, ascidians and other encrusting invertebrates at Rocky Bank
Fan hydroid at Rocky Bank

Marine life[edit]

The rocks are encrusted with a large range of colourful sponges, ascidians, soft corals, noble corals hydroids and coralline algae. Shoals of small fish, and larger yellowtail swim over the reef, and occasionally sharks will be seen.

Photography[edit]

If the visbility is good, almost any equipment should produce good results. Natural light will be blue or green due to the depth, so a strobe or other artificial light will be needed to bring out the bright reds and yellows.

Routes[edit]

The site is vast and large areas are not distinguished by any notable features. No routes are known yet, find a place of suitable depth and do a drift dive.

Stay safe[edit]

Hazards[edit]

Strong winds may develop over a short time. The site is far out to sea, it may be difficult for the boat to see unmarked divers on the surface.

Skills[edit]

The ability to deploy a DSMB is recommended.

Equipment[edit]

Take the most powerful light you have to bring out the true colours. The natural light is very blue due to the depth. Each group leader should tow an SMB to allow the boat to keep track of their position. Each diver should carry a DSMB or other brightly coloured signalling device that can increase visible height by at least a metre (yellow is considered most visible at sea). A whistle may also be useful in an emergency.


Back to Diving the Cape Peninsula and False Bay#Reefs

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