There was a problem with the configuration and by the end of 2005 , ISC was no longer offering the Shearwater electronics package .
Shearwater Research began by building controller boards for the Innerspace Systems Corp ( ISC ) Megalodon rebreathers in 2004 .
There was a problem with the configuration and by the end of 2005 , ISC was no longer offering the Shearwater Research electronics package .
Shearwater Research began by building controller boards for the Innerspace Systems Corp ( ISC ) Megalodon rebreathers in 2004 .