Explanation of symbols

Important information is marked with the following symbols:

1.1 General definitions

Aquaculture farm	Installation for the farming of fish.
Basin dimensions	The pen’s inner circumference.
Design working life	Assumed period for which a structure or part of it is to be used for its intended purpose with anticipated maintenance but without major repair being necessary.
Operation	Fish farming at site, including all installation and operation activities performed at the site while fish farming is in progress, and that are of relevance to the escape prevention of fish.
Accessories	Equipment that is not a main component.
Inspection	Systematic inspection/examination, usually visual, to ensure that the equipment satisfies the requirements.
Pen	Structure whose main function is to provide an enclosurewith buoyancy and/or stiffness.
Anchoring system	System of lines and bottom attachments with the main function of keeping the aquaculture farm or raft in position.
Bridles	Anchoring line between the pen and the anchoring system.
Main component	Part of an aquaculture farm that holds one or more of the installation’s load bearing main functions. Example: Pen, anchoring system, raft and enclosure.
Enclosure	Net or other system of load bearing parts that form a barrier between the farming volume in a production unit and the surrounding water volume.
Bracket	Component keeping the inner and outer floating collar pipes together.
Weight	Weight or other device attached to the net to achieve the intended shape. Centre weight is attached beneath the bottom centre of the net-cone.
Cage	Pen with enclosure.
NS9415:2021	Standard which sets out functional requirements for floating aquaculture farms and will be fundamental for stakeholders in the aquaculture industry, such as authorities, supervisory bodies, designers, suppliers, actors within R&D and manufacturers, as well as aquaculture farm owners.
NYTEK23 regulation	Governing Regulation for Fish Farming in Norway.
Circumference	Inner length of the inner floating collar.
Product certificate	Document confirming that the net is produced in accordance with requirements in NYTEK23 and NS9415:2021.
Suspension system	Weight, sinker tube or similar used to keep the three-dimensional shape of the net.

Table 1: General definitions.

1.2 Introduction

The rotatable net hook from ScaleAQ is used for raising of netting and jump skirt rope in a safe and easy way. The net hook has the advantage that it can be folded away to a resessed position when it is not in operation. This reduces the chance of chafing and wear to the net.

2 Description of the unit

The rotatable net hook is a product that only works with ScaleAQ steel brackets and consists of the following parts:

Mounting plate
Net hook
2 types of bolts (dimensions differ between items)
2 pcs. nuts

Pen dimension	Item number
FR450-560	504417
FR630	505485

Table 2: Item numbers for rotatable net hooks applicable to ScaleAQ FrøyaRingen dimensions (only for steel brackets).

3 Interaction with other components

The plate to which the rotatable net hook is attached has mounting holes that are adapted to a specific location on the ScaleAQ steel bracket at a good working height for raising the net. Rotatable net hook with mounting equipment has a maximum load tolerance of 300 kg. The net hook MUST NOT be loaded more than 300 kg.

4 Assembly of the unit

The rotatable net hook is assembled by using the supplied bolts, nuts and mounting plate when mounting to the steel bracket. See Figure 4.1 for fully assembled and installed net hook in both operational and resessed position.

Figure 4.1: Completely assembled rotatable net hook plate on steel bracket with the hook in the operating position on the left and in the recessed position on the right.

5 Installation on site

The rotatable net hook is easily installed on the steel bracket using the supplied mounting hardware.

6 Use

The net hook must be in the recessed position (hook facing the walkway) when there are no ongoing operations involving the net hook. When the net hook is needed for raising/lowering operations for the net or jump skirt rope, easily lift and rotate the hook to the operating position.

The net hook MUST ONLY be used for raising the net and jump skirt rope.

The net hook has a maximum load tolerance of 300 kg.

Risks related to improper use:

If the load on the net hook is exceeding 300 kg, there is a risk that the net hook can disattach and fall into the net. This can result in risk of damage to the net and fish escape.

7 Inspection and maintenance

A monthly visual check is recommended to ensure that there are no loose nuts or any deformations to the net hook. If deformation or damage is observed, replace the net hook immediately.

8 Transport and storage

When installing on site, the hook, plate and fastening material are delivered in separate bags. Shipped as general cargo.

9 Manufacturer and product identification

HEAD OFFICE
Scale Aquaculture AS	Phone: +47 48 85 24 88
Beddingen 16	E-mail: post@scaleaq.com
7042 Trondheim	www.scaleaq.com

Table 3: Contact information.

10 Revision history

Auditing	Changes	Date
0	The user manual is designed to meet new requirements in NS 9415: 2021.	26.04.2024
1	English version of this user manual is published.	09.03.2026
2	Information added: -Maximum load tolerance of rotatable net hook is 300 kg -Net hook must only be used for raising of netting and jump skirt rope	19.05.2026

Table 4: Revision history.

Manuals

Rotatable net hook

Scale Aquaculture AS