Also refer to Terms and definitions in Core GPG.
Adventure Activity Standard – See Introduction for details.
Active count system: a count system that requires the people being
counted to actively participate in the counting process. (For example, roll call, tagging or signing).
These systems tend to be slower than passive count
systems but are less prone to error.
Activity leader: the
collective noun for snorkelling guides and
Beaufort Wind Force Scale
(also referred to as the “Beaufort Scale”): a system for estimating wind
strengths without the use of instruments, based on the effects wind has on the
Buddy pair system: refer section 18.104.22.168
Buoyancy: the ability or
tendency of something to float in water. A snorkeller’s buoyancy is described as positive, neutral and negative buoyancy (see individual definitions).
Buoyancy aids: an item
or device that provides additional buoyancy.
Aids may include a snorkelling vest, kick boards, noodles etc.
Competence: ability to
apply knowledge and skills to achieve expected results.
someone who has the competence to perform
Confined water: a swimming pool or a naturally formed water site no
larger in area than approximately an Olympic size swimming
pool with a depth of less than 5 metres, and which offers swimming pool like conditions with respect to
water clarity and calmness. For area sizing of naturally formed water sites, an Olympic size swimming pool is used.
Count system: a means of
confirming if all participants are present or not. Used to confirm if all
participants are accounted for and/or have returned from snorkelling. There are two types of count system, see passive count system and active
Flash Flooding: is
flooding in a localised area with a rapid onset, usually as the result of
relatively short intense bursts of rainfall.
Free diving: snorkel diving with the primary focus of holding
ones breath for as long as possible and/or diving to the greatest depth
GPGs: Good Practice
Guide(s) – See Introduction for details.
Higher risk participants: Refer section 4.1 Participant considerations.
Hypoxic blackout: see shallow water blackout.
Knot(s): A measurement
of speed used in nautical situations. One knot is one nautical mile per hour.
(1 Knot = 1.852 Kilometres per hour.)
Land manager: the
organisation or owner with jurisdiction over the waterway or water body the
activity is conducted. Land manager may include marine authorities, marine
national park or sanctuary authorities, harbourmasters etc. Note that is may
differ from the marine safety agency. The
requirements of both the land manager and
the marine safety agency need to be
Lookout: a suitably
briefed responsible person who monitors the
participants during the activity. This may or may not be an activity leader.
Marine safety agency:
the statutory organisation that regulates the safety of watercraft and their
operations, in the jurisdiction the activity is conducted.
Nautical Mile: a
nautical mile (NM) is a unit of distance equal to 1,852 metres (1.852km).
Neutral buoyancy: the
tendency of something to remain floating at its current depth in water. The weight
is equal to the water it displaces so it neither rises or sinks.
Negative buoyancy: the
tendency of something to sink towards the bottom in water. The weight is
heavier than the water it displaces.
Open water: any body of
water that is not confined water. (See
definition confined water.)
Passive count systems: a
count system that requires little
participation by the people being counted. (For
example, a head count.) These systems tend to be quicker and less
intrusive but are also more susceptible to error. If passive systems are used,
the count must be conducted twice and wherever possible by different people.
Personal thermal protection:
clothing worn to mitigate the effects of the temperature of the environment.
Positive buoyancy: the
tendency of something to rise to the surface of water and float. The weight is
lighter than the water it displaces.
Responsible person: a competent person who is able to complete
delegated elements or tasks during an activity that does not require the
activity-specific competence of an activity leader.
SCUBA: acronym for
Self-Contained Underwater Breathing Apparatus.
SCUBA Diving: being
submerging and swimming below the water surface with the aid of compressed gas
Shallow water blackout:
a loss of consciousness under water caused by a lack of oxygen to the brain
following breath-holding. (Also known as hypoxic
Snorkel: a short tube
through which a person swimming just under the water surface can breath
Snorkel swimming: snorkelling on the surface of the water.
Snorkel diving: snorkelling
involving submerging and swimming below the water surface while holding ones
with the aid of a snorkel to breath.
Supervision ratio: the
number of participants that an activity leader may supervision, expressed as a
ratio. For example, the ratio 10:1 means 10 participants to 1
Swimming pool: an
artificial pool for swimming in. For area sizing of confined water, an Olympic size swimming pool is used.
particular circumstance or situation that causes an action to occur.
Also refer to the Core Good Practice Guide – Glossary.