Page 11 - Osprey Binder

Executive Summary

The purpose of this document is to communicate key safety information to the
Operators of the Immersion Test Rig, also known as the "Dunk Rig", and to other
stakeholders to show that the Rig is Designed, Manufactured, Fitted Out, Maintained
and Operated in a way that it is Fit For Purpose and to provide assurance that safety
risks are As Low As Reasonably Practicable (ALARP) and are being addressed
continually throughout the life of the rig and to provide a Design Safety Justification
(FDSJ) to allow its operation when operated by the Osprey Powerboat Rescue
Team.

There are two almost identical rigs that are used to provide the capability to carry out
immersion testing for powerboat racing drivers who predominantly drive racing boats
with enclosed cockpits and harness restraints. One rig is permanently used within
the UK and the other travels the world to venues where high speed Formula 1,
Formula 4S and Nations Cup races are held. The purpose of these rigs is to provide
an approximate simulation of an accident sequence during racing where the
raceboat is upside down in the water and the driver has to perform a controlled
escape. The rig is also used in training for rescue personnel to practice extricating
drivers who have become disabled during an accident sequence.

This document catalogues the design and construction information applicable to the
rigs as well as assessing the functional "Fitness for Purpose". This has been carried
out by a Risk Assessment and Hazard Analysis process known as HAZOPs and
SWIFT. The HAZOP is a structured "Hazard and Operability" process using
guidewords to determine if these rigs are suitable and safe to perform the functions
for which they are utilised and designed to accomplish. The SWIFT is a "Structured
What If" methodology that looks at what could possibly constitute hazards to their
tasks and operations.

The outcome of the HAZOPs and SWIFT provided a Preliminary Hazard List (PHL)
which was then analysed to ascertain the level of risk of injury or worse to the
operators and users as well to other personnel present at training sessions. This
analysis ranked the hazards in levels as shown in the matrix (Annex 1 - Risk Matrix).
From this matrix it was determined whether action was required to reduce that
perceived level of risk to a lower more acceptable level, which is known as ALARP
(As Low As Reasonably Practicable). Those hazards assessed as being of a higher
risk than the generally acceptable level had mitigations proposed to reduce the
levels to acceptable or had historical mitigations already in place to achieve the
desired levels. All hazards and their mitigations are entered into the Hazard Log
(Annex 2) as well as within the body of this report Safety Summary (Chapter 5.0)
and ALARP Statements (Chapter 6.0).

The design of these rigs was completed by major raceboat builder with much
experience in the construction of the "Safety Cell" which is incorporated into modern

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