Future Technological Developments in Deep-Sea Fishing
DIRECTIONS FOR FUTURE TECHNOLOGICAL DEVELOPMENTS
-THE NEXT STEPS
-
Pablo Parra Henríquez
|
Senior Mechanical Engineer
| AS
FISKEVEGN
COLTO Whale Depredation Workshop – Punta Arenas, Chile, 16-18 March 2016
Further testing and development of CPD concepts
-
CPDs – Catch Protection Devices
-
FISKEVEGN
is currently modelling hydrodynamic forces in deep-water
tornado trolling and deep-sea longline fishing
-
With and without CPDs
COLTO Whale Depredation Workshop – Punta Arenas, Chile, 16-18 March 2016
F
u
r
t
h
e
r
t
e
s
t
i
n
g
a
n
d
d
e
v
e
l
o
p
m
e
n
t
o
f
C
P
D
s
c
o
n
c
e
p
t
s
COLTO Whale Depredation Workshop – Punta Arenas, Chile, 16-18 March 2016
D
E
E
P
W
A
T
E
R
T
O
R
N
A
D
O
T
R
O
L
L
I
N
G
F
l
u
m
e
t
a
n
k
e
x
p
e
r
i
m
e
n
t
s
F
u
r
t
h
e
r
t
e
s
t
i
n
g
a
n
d
d
e
v
e
l
o
p
m
e
n
t
o
f
C
P
D
c
o
n
c
e
p
t
s
COLTO Whale Depredation Workshop – Punta Arenas, Chile, 16-18 March 2016
FISKEVEGN
pursues Catch Protection Devices based on knowledge
obtained during these years to present a new solution that can be
manageable at sea.
Modelling and tank trials simulating deep-sea longline fishing are on-
going
Design iterations followed by field tests in deep-sea conditions are
pending
Volounteer vessel(s) will be needed for field trials
F
u
r
t
h
e
r
t
e
s
t
i
n
g
a
n
d
d
e
v
e
l
o
p
m
e
n
t
o
f
t
h
e
C
P
D
c
o
n
c
e
p
t
s
COLTO Whale Depredation Workshop – Punta Arenas, Chile, 16-18 March 2016
Zone determinaded by a rapid vertical, tangential drag
Zone determinaded by a rapid horizontal, normal drag
Zone determinaded by gentle vertical, normal drag
-
Proper understanding of forces from gravitation, accelerations and hydrodynamic
processes is needed, with and without deployed containment solutions.
Hydrodynamic rope drag can be
estimated as two components; normal
(N) and tangential (T) drag
F
u
r
t
h
e
r
t
e
s
t
i
n
g
a
n
d
d
e
v
e
l
o
p
m
e
n
t
o
f
t
h
e
C
P
D
c
o
n
c
e
p
t
COLTO Whale Depredation Workshop – Punta Arenas, Chile, 16-18 March 2016
-
Already loss of longline gear occurs frequently
-
Preventing additional loss of containers and lines will be an essential objective
-
Launch and recovery of any heavy overboard object at high sea is a challenge in its own right
O
p
e
r
a
t
i
o
n
a
l
a
p
p
r
o
a
c
h
e
s
COLTO Whale Depredation Workshop – Punta Arenas, Chile, 16-18 March 2016
-
We assume that orcas and other cetaceans are able to recognize the sound of
longline operations.
A simple conclusion; if we are able to reduce the noise, we will be
reducing the distance of detection
FISKEVEGN fishing gears are already
relatively quiet. We now incorporate
noise reduction criteria
in
the new
generation of longline systems
.
This is
already in the phase of engineering and
prototypes.
O
p
e
r
a
t
i
o
n
a
l
a
p
p
r
o
a
c
h
e
s
COLTO Whale Depredation Workshop – Punta Arenas, Chile, 16-18 March 2016
-
If rapid hauling is going to be part of the operational strategy - development of
longlines and mechanical equipment has to adapt to this.
-
Fiskevegns tests of new prototypes show that next-generation longline systems
will have an over-capacity for rapid hauling and setting.
-
The main contraints instead lie in:
-
Health and safety issues for crew due to increased accident risks
-
Time and working conditions for proper handling of longlines and hooks
-
Increased risks for loss of gear, with catches on them
-
Incomplete understanding of the hydrodynamics of longline hauling
-
Development of longline gear that can keep up with increased physical strains
-
Increased loss of fish that is ripped off fast-moving or rapidly accelerating gears by inertia or
hydrodynamic drag – losses that need to be quantified
COLTO Whale Depredation Workshop – Punta Arenas, Chile, 16-18 March 2016
THANK YOU
Senior Mechanical Engineer Pablo Parra Henríquez discusses the ongoing testing and development of Catch Protection Devices (CPDs) for deep-water tornado trolling and deep-sea longline fishing. The focus is on understanding hydrodynamic forces, improving containment solutions, and preventing loss of fishing gear at sea.
Download Presentation
Please find below an Image/Link to download the presentation.
The content on the website is provided AS IS for your information and personal use only. It may not be sold, licensed, or shared on other websites without obtaining consent from the author. Download presentation by click this link. If you encounter any issues during the download, it is possible that the publisher has removed the file from their server.
E N D
Presentation Transcript
DIRECTIONS FOR FUTURE TECHNOLOGICAL DEVELOPMENTS -THE NEXT STEPS- Pablo Parra Henr quez | Senior Mechanical Engineer | AS FISKEVEGN COLTO Whale Depredation Workshop Punta Arenas, Chile, 16-18 March 2016
Further testing and development of CPD concepts - CPDs Catch Protection Devices - FISKEVEGN is currently modelling hydrodynamic forces in deep-water tornado trolling and deep-sea longline fishing - With and without CPDs COLTO Whale Depredation Workshop Punta Arenas, Chile, 16-18 March 2016
Further Further testing testing and and development development of of CPDs CPDs concepts concepts DEEPWATER TORNADO TROLLING Flume tank experiments COLTO Whale Depredation Workshop Punta Arenas, Chile, 16-18 March 2016
Further Further testing testing and and development development of CPD of CPD concepts concepts FISKEVEGN pursues Catch Protection Devices based on knowledge obtained during these years to present a new solution that can be manageable at sea. Modelling and tank trials simulating deep-sea longline fishing are on- going Design iterations followed by field tests in deep-sea conditions are pending Volounteer vessel(s) will be needed for field trials COLTO Whale Depredation Workshop Punta Arenas, Chile, 16-18 March 2016
Further Further testing testing and and development development of of the the CPD CPD concepts concepts - Proper understanding of forces from gravitation, accelerations and hydrodynamic processes is needed, with and without deployed containment solutions. Hydrodynamic estimated as two components; normal (N) and tangential (T) drag rope drag can be Zone determinaded by a rapid vertical, tangential drag ?+ ?? ? ??= ?? Zone determinaded by a rapid horizontal, normal drag Zone determinaded by gentle vertical, normal drag COLTO Whale Depredation Workshop Punta Arenas, Chile, 16-18 March 2016
Further Further testing testing and and development development of of the the CPD concept CPD concept - Already loss of longline gear occurs frequently - Preventing additional loss of containers and lines will be an essential objective - Launch and recovery of any heavy overboard object at high sea is a challenge in its own right COLTO Whale Depredation Workshop Punta Arenas, Chile, 16-18 March 2016
Operational Operational approaches approaches - We assume that orcas and other cetaceans are able to recognize the sound of longline operations. A simple conclusion; if we are able to reduce the noise, we will be reducing the distance of detection FISKEVEGN fishing gears are already relatively quiet. We now incorporate noise reduction criteria in the new generation of longline systems. This is already in the phase of engineering and prototypes. COLTO Whale Depredation Workshop Punta Arenas, Chile, 16-18 March 2016
Operational Operational approaches approaches - If rapid hauling is going to be part of the operational strategy - development of longlines and mechanical equipment has to adapt to this. - Fiskevegns tests of new prototypes show that next-generation longline systems will have an over-capacity for rapid hauling and setting. - The main contraints instead lie in: - Health and safety issues for crew due to increased accident risks - Time and working conditions for proper handling of longlines and hooks - Increased risks for loss of gear, with catches on them - Incomplete understanding of the hydrodynamics of longline hauling - Development of longline gear that can keep up with increased physical strains - Increased loss of fish that is ripped off fast-moving or rapidly accelerating gears by inertia or hydrodynamic drag losses that need to be quantified COLTO Whale Depredation Workshop Punta Arenas, Chile, 16-18 March 2016
THANK YOU COLTO Whale Depredation Workshop Punta Arenas, Chile, 16-18 March 2016
