About Hammerhead configuration

In 2005, when I started to use Hammerhead electronics on the Inspiration rebreather, I focused myself on the whole configuration of the rebreather.

Keeping in mind the DIR philosophy also with rebreather, the configuration that since 2007 I suggest to all is different from the standard Juergensen Marine configuration of the Hammerhead.

The first steps were to make the configuration as 'clean' as possible.

First of all, taking advantage of the availability of Kevin Juergensen, all my Hammerhead electronics started to be configured with the primary to the right side and the secondary to the left side.

In this manner the management of lights with battery canister and dpv were the same than diving with an OC.
Because I always hated seeing in many pictures the cables that connect the electronics housing that did arches with potential entanglements, I started to think how to avoid it. The things to consider were the 'right' lenght of the cables and how was possible to route them in a better way, taking advantage from the rebreather design.

Considering the average lenght of the arm of a person, till 1,85 meter tall, and the 'right' routing, the ideal lenght of the cable seemed to be between 100 and 105 centimeters.

The 'right' routing considers that the cable pass immediately under the breathing hoses connected to the head and then have to pass under the armpits of the diver. In this way the cables of electronic follow the body of the diver, avoiding making bows and less likely the entanglements or damages to the cables.

The result was that this configuration becames a standard in italian market and JM put it in its product list.

Going on, I changed also the lenght of the loop hoses. Instead of the 13 inches hoses for the front part, I chose to mount 11 inch hoses like for the back side of the loop. In this case the benefits are not so obvious but they works. It's easier to lead water that lay in the hoses to the counterlungs and also diluent and oxygen flush results easier to manage, venting out the excess of gas from around the mouth. Moreover it's possible to catch the mouthpiece directly with the mouth without use hands and spare are less expensive to manage. Someone observed also a better balance in the buoyancy of the BOV in the front part of the loop but I'd prefer to consider this a 'personal' sensation.

Always in the first part of 2008 I adopted the 'flying hose' for the BOV. Considering that in dive that are deeper than 30 meters, to have the BOV connected to the 3lt inboard tank could only complicate a real bailout situation, I decided to mount a LP hose of (maximum) 70cm length, by passing it behind the neck and connecting it through a QD (Swagelock or Omniswivel) to a (maximum) 20cm LP hose installed on the first stage of the bailout tank.

Also this solution bacames a standard and divers started to adopt this configuration...

All the experience accumulated from the beginning are collected in our STDA manuals and developed in our Hammerhead ccr courses

Below a picture of one of our student showing a streamline configuration, during a first level Hammerhead rebreather course