DIVE DRY WITH DR. BILL #772: DIVING FARNIE
There's been a bit of talk about my favorite Catalina dive site on ScubaBoard and Facebook lately. I'm referring to Farnsworth Bank, a seamount rising up from the depths about 1.5 miles off Ben Weston Point on Catalina's windward coast. The Bank was named after legendary Avalon fishing boat captain George Farnsworth. It is not quite high enough to reach the surface and the shallowest pinnacle is about 62 fsw. As sea level rises in this century, it will get even deeper... but only by inches or a few feet!
Due to the depth and the frequent appearance of strong currents (not to mention the occasional great white shark!), the site is considered an advanced dive. The depth also makes it a good location for technical divers to practice their skills. Technically I'm not a technical, but I've done numerous dives that would qualify (and I survived them all!).
As a biologist, the appeal of this site for me is not just the interesting submarine topography, but the presence of a number of interesting critters. The purple hydrocoral (Stylaster californicus) is the species that usually attracts the most attention for divers. However, there are also walls of the orange zoanthid Epizoanthus giveni named after Dr. Bob Given, former director of the Wrigley-USC marine lab at Two Harbors and someone who helped me learn the local critters when I first arrived on Catalina back in the 1960s.
One of my favorites there is the "red spotted starfish," once thought to be Hacelia bozanici but it may be an unidentified species in that genus instead. Although not necessarily rare or unusual, I often encounter many torpedo or electric rays (Torpedo californica). These fish, somewhat resembling the starship Enterprise, teach many divers a primary rule... do not touch! Back in the 1980s one member of our Cousteau team filming their channel islands documentary learned this lesson in shocking detail! I have seen as many as eight on one dive there, although often at depths of 150-180 fsw.
Dr. Sam Miller, a long-time SoCal pioneer diver, was in the first group to dive Farnsworth back in 1960. I recently read his account of that dive. Two things he wrote saddened me. He referred to the many sharks (mostly blues) that frequented the site back then. When I first started diving Catalina in the late 1960s, there were many blues in our waters. Those days are gone. He also mentioned the harvesting of the purple hydrocoral back in those days. Fortunately the species is protected today although the anchors of fishing and dive boats often damage this slow growing species. Sadly despite decades of talk, there are still no mooring buoys on the site.
The depth at the base of the Bank is about 300 fsw. Of course I'm not that deep a fellow and limit my maximum depth to 200 fsw to avoid oxygen toxicity and potential death. I want to live to die... er, dive... another day. This site is challenging enough so no need to add additional potential threats. However I have had two incidents out of my eight dives at Farnsworth that I'll briefly relate to my readers.
One time I had descended to a "modest" depth (about 150 fsw) and stayed at depth for some time before ascending. I had incurred a significant deco time on that dive but between my HP120 SCUBA tank and my pony bottle, I had plenty of gas to complete my deco stop. Unfortunately while hanging on my last stop at 15 fsw, I tried switching to my pony bottle. The mouthpiece on my reg was torn, making breathing off it a chore. Fortunately, instructor Tim Mitchell had a pony bottle he didn't need and let me finish my deco stop with it.
Although visibility at this offshore site is often quite good, on one dive we were enveloped in a cloud of plankton and couldn't see very far. I did a relatively shallow dive (max depth about 100 fsw) and when I started to ascend, I could not see the anchor line... my "life line" to the surface. To top it off, a decent current had kicked up. I was going to have to do a blue water deco stop without a guide line. The poor visibility and current made it difficult to stay aligned with the pinnacle and I had to kick hard. And "out there" away from the line and the other divers, I kept a sharp eye out for the landlord!
Jimi Hendrix once asked "are you experienced." Fortunately as a well experienced diver by this time, neither of these incidents were truly dangerous. However newer divers (and many old geezers like myself) need to dive Farnsworth with a bit of caution. It is a beautiful dive but one must respect its advanced nature! And remember while protecting yourself, that marine life here is fully protected except for the take of pelagic fin fish.
© 2018 Dr. Bill Bushing. For the entire archived set of nearly 775 "Dive Dry" columns, visit my website Star Thrower Educational Multimedia (S.T.E.M.) Home Page
Image caption: Ross Overstreet's great submarine bathymetry image of Farnsworth, purple hydrocoral, orange zoanthid and red spotted sea star.
There's been a bit of talk about my favorite Catalina dive site on ScubaBoard and Facebook lately. I'm referring to Farnsworth Bank, a seamount rising up from the depths about 1.5 miles off Ben Weston Point on Catalina's windward coast. The Bank was named after legendary Avalon fishing boat captain George Farnsworth. It is not quite high enough to reach the surface and the shallowest pinnacle is about 62 fsw. As sea level rises in this century, it will get even deeper... but only by inches or a few feet!
Due to the depth and the frequent appearance of strong currents (not to mention the occasional great white shark!), the site is considered an advanced dive. The depth also makes it a good location for technical divers to practice their skills. Technically I'm not a technical, but I've done numerous dives that would qualify (and I survived them all!).
As a biologist, the appeal of this site for me is not just the interesting submarine topography, but the presence of a number of interesting critters. The purple hydrocoral (Stylaster californicus) is the species that usually attracts the most attention for divers. However, there are also walls of the orange zoanthid Epizoanthus giveni named after Dr. Bob Given, former director of the Wrigley-USC marine lab at Two Harbors and someone who helped me learn the local critters when I first arrived on Catalina back in the 1960s.
One of my favorites there is the "red spotted starfish," once thought to be Hacelia bozanici but it may be an unidentified species in that genus instead. Although not necessarily rare or unusual, I often encounter many torpedo or electric rays (Torpedo californica). These fish, somewhat resembling the starship Enterprise, teach many divers a primary rule... do not touch! Back in the 1980s one member of our Cousteau team filming their channel islands documentary learned this lesson in shocking detail! I have seen as many as eight on one dive there, although often at depths of 150-180 fsw.
Dr. Sam Miller, a long-time SoCal pioneer diver, was in the first group to dive Farnsworth back in 1960. I recently read his account of that dive. Two things he wrote saddened me. He referred to the many sharks (mostly blues) that frequented the site back then. When I first started diving Catalina in the late 1960s, there were many blues in our waters. Those days are gone. He also mentioned the harvesting of the purple hydrocoral back in those days. Fortunately the species is protected today although the anchors of fishing and dive boats often damage this slow growing species. Sadly despite decades of talk, there are still no mooring buoys on the site.
The depth at the base of the Bank is about 300 fsw. Of course I'm not that deep a fellow and limit my maximum depth to 200 fsw to avoid oxygen toxicity and potential death. I want to live to die... er, dive... another day. This site is challenging enough so no need to add additional potential threats. However I have had two incidents out of my eight dives at Farnsworth that I'll briefly relate to my readers.
One time I had descended to a "modest" depth (about 150 fsw) and stayed at depth for some time before ascending. I had incurred a significant deco time on that dive but between my HP120 SCUBA tank and my pony bottle, I had plenty of gas to complete my deco stop. Unfortunately while hanging on my last stop at 15 fsw, I tried switching to my pony bottle. The mouthpiece on my reg was torn, making breathing off it a chore. Fortunately, instructor Tim Mitchell had a pony bottle he didn't need and let me finish my deco stop with it.
Although visibility at this offshore site is often quite good, on one dive we were enveloped in a cloud of plankton and couldn't see very far. I did a relatively shallow dive (max depth about 100 fsw) and when I started to ascend, I could not see the anchor line... my "life line" to the surface. To top it off, a decent current had kicked up. I was going to have to do a blue water deco stop without a guide line. The poor visibility and current made it difficult to stay aligned with the pinnacle and I had to kick hard. And "out there" away from the line and the other divers, I kept a sharp eye out for the landlord!
Jimi Hendrix once asked "are you experienced." Fortunately as a well experienced diver by this time, neither of these incidents were truly dangerous. However newer divers (and many old geezers like myself) need to dive Farnsworth with a bit of caution. It is a beautiful dive but one must respect its advanced nature! And remember while protecting yourself, that marine life here is fully protected except for the take of pelagic fin fish.
© 2018 Dr. Bill Bushing. For the entire archived set of nearly 775 "Dive Dry" columns, visit my website Star Thrower Educational Multimedia (S.T.E.M.) Home Page
Image caption: Ross Overstreet's great submarine bathymetry image of Farnsworth, purple hydrocoral, orange zoanthid and red spotted sea star.