Term
| All signals are to be preceded by |
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Definition
| one pull to call attention |
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Term
| If a signal is not understood, |
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Definition
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Definition
| firm, slow and steady signal |
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Definition
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Term
| The diving supervisor for a diving operation shall ensure... |
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Definition
| that an adequate lifeline is attached to each diver |
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Term
Lifelines
O.Reg. 629/94
Without limiting the generality of subsection (1), the diving supervisor for a diving operation shall ensure that any lifeline used in the diving operation: |
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Definition
(a) is of sound construction and adequate strength
and is free from patent defects
(b) is adequately maintained
(c) is free from knots, other than knots necessary to
attach the lifeline to the diver and the dive site,
is free of splices and has a breaking strength of
not less than 2450 kilograms;
(d) is securely attached to the diver’s harness;
(e) is no longer than is reasonably required to
perform the work;
(f) where the diver is using surface-supplied diving
techniques, is attached securely to the dive site;
(g) where the diver is using SCUBA, is attached
securely to the dive site or to a float visible to
the diver's tender;
(h) where the diver is operating from a submersible
compression chamber or a lock-out submersible,
is attached securely to the chamber or submersible;
(i) where the diver is using surface-supplied diving
techniques, is tended at all times by a diver’s
tender by continuously holding the lifeline;
(j) where the diver is using SCUBA, is tended at all
times by a diver’s tender, by continuously holding
the lifeline or, in the case of a lifeline attached to a float, by
continuously observing the float;
(k) where the diver is operating from a submersible
compression chamber, is attached at all times by
a submersible compression chamber attendant
by continuously holding the lifeline; and
(l) where the diver is using an umbilical bundle, is
incorporated in the umbilical bundle. |
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Term
| What do you think influences the type of search technique you would use? |
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Definition
-Weather conditions
-Sea State
-U/W visibility
-Nature of the sea floor
-Currents
-Size & shape of the area to be searched
-Water temperature
-Diving base
-Diving equipment & support facilities
-Nature of the target |
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Term
| List the 6 types of searches |
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Definition
Lifeline Search
Circular Search
Towed Diver Search
Snagline Search
Grid Search
Jackstay Search |
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Term
| The lifeline search is used off of: |
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Definition
| jetties, piers, or the shore to locate objects within a limited distance |
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Term
| The lifeline searches features are: |
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Definition
-Excellent search technique in limited visibility
-Good search coverage
-May be tiring to the diver |
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Term
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Definition
-Diver goes to the end of his lifeline, at right angles to his tender
-Diver keeping lifeline taught, proceeds until stopped or reaches shore, dock, pier, etc.
-Moves in twice his visibility, again keeping lifeline taught, proceeds in opposite direction
-Continue until the target is found
-Buoy or mark the target |
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Term
| List all the jackstay searches. |
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Definition
Circle Search
Grid Search
Snagline |
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Term
| Searches using the light jackstay method, although slow, are the... |
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Definition
most reliable.
With unfavorable sea bed conditions and poor u/w visibility, these searches are the ones that offer the best chance of success. |
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Term
| Circle Search features are: |
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Definition
-Used where the bottom is free of projections
-Flat bottom
-Position of the object is fairly accurately known |
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Term
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Definition
-Diver attaches search line to an anchor or is tended by another diver also on bottom
-Diver then proceeds to the end of his search line and proceed in a circular direction, while keeping the line taught
-When the diver reaches a mark placed at the completion of a complete circle, he will move in twice his visibility and proceed in the opposite way |
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Term
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Definition
| Most thorough and efficient bottom search |
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Term
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Definition
-Lay standing jackstays to form sides of a rectangle
-Rig a moveable jackstay between the standing jackstays
-The diver proceeds along moveable jackstay until he reaches the other side then moves movable jackstay in twice his visibility |
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Term
| Snagline Search is used when: |
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Definition
| the sea floor is reasonably flat and clear of obstructions and the target protrudes from the sea bed |
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Term
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Definition
-Jackstays are laid parallel to each other in sufficient number to cover the area to be searched
-Two divers descend to the jackstay, one on each, holding between them a snagline
-On the bottom the divers swim along their respective jackstays until the end or until they snag the target
-When they snag an object, the divers will tie off each of their snaglines and follow it along to the snag |
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Term
| Towed Diver Search features: |
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Definition
-You would use this search when a large area is to be searched
-It should be clear of obstructions and have reasonably good visibility |
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Term
| Towed Diver Search: Things used, and things to be aware of: |
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Definition
-Tow Bar
-Sled
-Marker buoy
-Monitor depth
-Ensure regulators are not free flowing
-Be aware of propellers |
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Term
| Remember it is the divers responsibility to keep |
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Definition
| the lifeline taught during all underwater searches. The tender shall not give or take up slack unless instructed to. |
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