Hanse 370 User manual

Skipper’s
Manual
Sailing Yacht “Hanse 370”
Hanse Yachts GmbH & Co. KG
Salinenstraße 22
17489 Greifswald / Germany
Tel.: [phone]; Fax: [phone]
www.hanseyachts.com

ii
- Leerseite -

H A N S E 3 7 0
i
Table of Contents
Introduction III
Design Category, Identification IV
Builder’s Plate IV
Warning Notes V
Declaration of Conformity VII
Annex to the Declaration of Conformity VIII
Certificate of Conformity IX
CHAPTER 1 SAFETY NOTES 1
1. Description of the Boat 1
1.1. GENERAL DESCRIPTION 1
1.2. MAIN DATA 1
1.2.1. Main dimensions 1
1.2.2. Displacement and masses 2
1.2.3. Maximum number of persons and load capacity 2
1.2.4. Motorization 4
1.2.5. Electrical system 4
1.3. GENERAL PLAN 5
1.3.1. Description of the structure 5
1.3.2. Furnishing plan 8
1.4. DRIVE SYSTEM 9
1.4.1. Engine room, motoring 9
1.5. SAFETY NOTES 9
1.5.1. Flooding, watertight integrity 9
1.5.2. Hull openings, seacocks 10
1.5.3. Stability 11
1.5.4. Fire protection 11
CHAPTER 2 –FURTHER TECHNICAL DETAILS 16
1. Installations and Systems 16
1.1. TANK CAPACITIES 16
1.2. WATER SYSTEMS 16
1.2.1. Drinking water 16
1.2.2. Seawater 17
1.2.3. Black water 17
1.2.4. Bilge system 19
1.3. FUEL SYSTEM 19
1.4. STEERING SYSTEM 20
1.5. ELECTRICAL SYSTEMS 20
1.5.1. Direct current system 21
1.5.2. Alternating current system 23
1.5.3. Navigation systems 23
1.6. ANCHORING,TOWING AND MOORING EQUIPMENT 24
1.6.1. General 24
1.6.2. Anchoring 24
1.6.3. Towing 24
1.6.4. Mooring 24
1.7. ENGINE SYSTEM 25
1.7.1. Structure of the engine room 25
Include the opening for the sail drive in your regular inspections. 25
The exact description of the drive plant is in the operating instruction for the engine. 25
1.7.2. General 25
1.7.3. Instruments 25
1.7.4. Cooling system 26

H A N S E 3 7 0
ii
1.7.5. Exhaust system 27
1.7.6. Lubrication 27
1.7.7. Gears 28
1.7.8. Gear shift 28
1.7.9. Sail drive 28
1.7.10.Propeller 28
1.8. VENTILATION 29
1.9. HEATING 29
1.10. LIQUEFIED PETROLEUM GAS SYSTEM 29
1.10.1.Installation 29
1.10.2.Changing the gas cylinder 30
1.10.3.Operating the gas system 30
1.11. CORROSION PROTECTION,PAINTING SYSTEM 31
1.12. MANUALS AND OPERATING INSTRUCTIONS 31
2. Initial Operation 31
2.1. TRANSPORT,CRANING,SLIPPING 31
2.1.1. General notes 31
2.1.2. Attachment points for lifting gear, support points for slipping and transport 31
2.2. UNDERWATER PAINTING 32
2.3. ENGINE,PROPELLER 32
2.4. EQUIPMENT 32
2.5. FIRST VOYAGE 32
2.6. MANOEUVRING BY ENGINE 33
2.7. CHECKING THE SYSTEMS 33
3. Environmental Protection 33
3.1. FUELS AND OILS 33
3.2. WASTE 34
3.3. SOUND 34
3.4. SWELL 34
3.5. EXHAUST GASES 34
3.6. ANTIFOULING,PAINTING 34
3.7. VARNISH REMOVAL 34
3.8. BLACK WATER 34
3.9. NATURE CONSERVANCY 35
4. Maintenance 35
4.1. EXTERNAL INSPECTION 35
4.2. CARE AND CLEANING 35
4.3. RIGGING AND SAILS 35
4.3.1. Rigging 35
4.3.2. Sails 35
4.4. PAINTING 36
4.5. EXPENDABLE PARTS AND REPLACEMENTS 36
4.6. REPAIRS 36
4.7. INSPECTION OF INSTALLATIONS AND SYSTEMS 36
4.8. WINTER STORAGE 36
4.8.1. Hull and deck 37
4.8.2. Rigging 37
4.8.3. Electrical equipment 37
4.8.4. Systems and tanks 37
5. Rescue equipment 37
6. Warranty 38
7. Concluding remarks and notes 38
8. List of delivered manuals, plans and operating instructions 38
Proof of Identity
Acknowledgement of Receipt

H A N S E 3 7 0
iii
Introduction
This manual is to help you handle your sailing yacht safely and with pleasure. It contains general
information on the yacht and its systems, as well as on operation and maintenance. Please use this
manual to acquaint yourself with your yacht before setting off on your first voyage. Further help
regarding individual devices that are part of the yacht’s equipment can be obtained in the device’s
operating instructions.
This Skipper’s Manual is not a course dealing with watercraft safety or the art of sailing. For your
own safety and convenience, should this be your first sailing yacht or if you are not yet familiar with
the special features of a sailing yacht, please acquaint yourself with the handling and operation of this
yacht before taking charge of it. Your dealer or national sailing or motor boat association or yacht
club will be pleased to inform you of training possibilities in case you would like to expand or refresh
you knowledge in this way.
Please make sure that the expected wind and swell conditions are in accordance with the design
category of your boat and that you and your crew are capable of handling the boat under these
conditions.
Your yacht is adequately designed, but you must be able to cope with the sea and wind conditions
of storms of category A up to the serious conditions of the top category C, including the risk of
breakers or strong gusts of wind, which comply with the design categories A, B and C. They are
considered to be dangerous conditions under which only a competent, capable and trained crew
with a well maintained watercraft can operate in a satisfactory manner.
This manual is not a detailed instruction guide for maintenance or trouble-shooting. In case of
problems, please consult your dealer. If a maintenance manual is provided, use it to perform
maintenance on your watercraft.
Only commission trained and competent staff for maintenance, repairs or modifications of this
yacht. Modifications that could have an impact on the safety features of the boat must be assessed,
implemented and recorded by qualified specialists. The boat’s manufacturer cannot be made
responsible for modifications that he has not approved.
In some countries, a license or an authorisation is required, or special regulations apply.
Perform maintenance work on your boat in a proper manner and consider the wear that can occur
over time and through frequent or improper use of the boat.
Any watercraft, no matter how solidly it is built, can be seriously damaged by improper handling.
This is not compatible with safely handling of your boat. Always adapt the boat’s speed and
direction of travel to the sea conditions.
If your boat is equipped with an inflatable life raft, read the corresponding operating instructions
carefully. The watercraft should have the appropriate rescue equipment on board (life jackets, safety
belts, etc.) in accordance with the type of watercraft, the weather conditions, etc. In some countries,
this equipment is mandatory. The crew should be familiar with how to handle all safety equipment
and with manoeuvring in cases of emergency (man-overboard rescue, mooring, etc.). Sailing and
motor boat schools and clubs organise training courses on a regular basis.
When above deck, all persons should wear buoyancy aids (life jackets, personal buoyancy aids).
Please pay attention to the fact that in some countries legal requirements stipulate wearing a
buoyancy aid in compliance with national regulations.
We recommend keeping this manual on board so that it can be used as an operating guide or for
possible trouble-shooting.
Certain figures may contain equipment features that are not included in the contract.

H A N S E 3 7 0
iv
The Hanse Yachts GmbH warmly welcomes you to the circle of Hanse sailing yacht owners and
thanks you for the confidence you have placed in our product by purchasing this yacht.
Your contracting party as well as the management and employees of Hanse Yachts GmbH wish
you a lot of pleasure with your new sailing yacht.
May you always have good sailing!
Hanse Yachts GmbH & Co. KG
Management
PLEASE KEEP THIS MANUAL IN A SAFE PLACE AND GIVE IT
TO THE NEW OWNER IF YOU SELL THE YACHT.

H A N S E 3 7 0
v
Design Category
One of the requirements of the European Recreational Craft Directive is that each watercraft must
be classified in a design category.
The sailing yacht “Hanse 370” is classified as category A.
In the Directive, design category A is characterised as follows:
Design category A: Ocean
Designed for extended voyages where conditions may exceed wind force 8 (Beaufort scale) and
significant wave heights of 4 m and above, and vessels largely self-sufficient. Extreme weather
conditions such as hurricanes are excluded.
Certification
In accordance with the EC Directive, the certification module B+C was chosen for this yacht. The
notified body issued an EC type-examination certificate for this type, certifying that the essential
requirements were checked and have been fulfilled. The manufacturer confirms the conformity with
the type.
Lloyd’s Register Quality Assurance GmbH – Yacht Services –, located in Hamburg, was
commissioned as a notified body according to the EC Recreational Craft Directive (see Declaration
of Conformity).
Identification
The hull identification is mounted on the starboard side of the transom. It is a globally unique
sequence of numbers and letters.
Another number is affixed at a concealed place only known to the manufacturer. This serves to
identify your yacht in case of theft.
The number is:
Builder’s Plate
In accordance with the requirement of the Directive, the builder’s plate is affixed in the cockpit. The

H A N S E 3 7 0
vi
information it contains is stipulated and should be explained here.
Explanations
Warning Notes
In many chapters of the owner’s manual you will find notes meant to facilitate trouble-free
operation and maintenance, but also to warn against dangers. For reasons of clarity, they are
highlighted in boxes.
Danger
Indicates that there is an extreme, real source of danger that is very likely
to cause death or irreparable injuries should no appropriate measures be
taken.
Attention
Stands for a reminder of safety precautions or draws attention to ways of
handling that may be unsafe or lead to personal injuries or damage the
watercraft, its components or the environment.
Warning
Means that there is a source of danger that may cause injuries or death
should no appropriate measures be taken.
Note
Here we give you valuable advice facilitating the operation or handling of
the watercraft or its components.
–Design Category A :
Ocean
–Max. = 8= 600 kg:
Maximum number of persons recommended by the
manufacturer when the boat is underway in the sea
territory of its design category.
–Max. = + = 1.200:
The maximum additional load consisting of 8 persons,
food and provisions, (the basic equipment, life rafts,
tank contents and personal equipment are not included).
Please take note of Sections 1.2.2 and 1.1.
–CE:
CE marking as proof that the boat was built according
to the requirements of the Directive and conforms to
the type checked by a notified body (here: Lloyd’s
Register Quality Assurance GmbH ).

H A N S E 3 7 0
vii
EC Declaration of Conformity
in compliance with the EC Recreational Craft Directive 94/25/EC,
Annex XV
We hereby declare that this boat, which is described in more detail below,
complies with the essential safety and health requirements as laid down in
the EC Recreational Craft Directive regarding its concept and construction
as well as the model placed on the market by us. This statement shall lose
its validity in case of any modifications to the boat that have an effect on
the “essential safety requirements” and which have not been agreed upon
with us.
Name of boat:
Hanse 370
Type:
Sailing yacht
Serial number of hull:
Design category:
A ( Ocean )
Certification module:
Aa
Applicable Directive:
EC Recreational Craft Directive (94/25/EG)
See Annex to the Declaration of Conformity
Notified body:
Lloyd’s Register Quality Assurance GmbH
- Yacht Services -
Identification number: 0098
Address:
Mönckebergstraße 27, D-20095 Hamburg
Germany
Certificate of Conformity
No.:
88.01.0836 / Date 15 August 2005
Date / Signature of the authorized representative in the EU
Dr. Helmut Risch
Address of signatory:
Südkaten 12b, D-18375 Wieck/Darß
Manufacturer :Hanse Yachts GmbH & Co. KG; Salinenstraße 22; D–17489
Greifswald

H A N S E 3 7 0
viii
Annex to the Declaration of Conformity
APPLIED HARMONISED STANDARDS AND/OR DRAFT STANDARDS
RELATING TO THE PARAGRAPHS OF DIRECTIVE 94/25/EC
EC Directive
Applied standards:
1. Main dimensions
8666
2.1. Hull identification
10087
2.2. Builder’s plate / Number of persons
14945, 11192, 14946
2.3. Protection from falling overboard
15085
2.5. Owner’s manual
10240
3.1. Structure
Germanischer Lloyd, ABS
3.2. Stability and freeboard
12217-2
3.3. Buoyancy and floatation
12217-2
3.4. Openings in hull
12216; 9093 Part 1
3.5. Flooding
11812; 12216;15083
3.6. Maximum recommended load
14946
3.7. Liferaft stowage
In accordance with the
requirements of the Directive
3.8. Escape
9094- Part 1, 12216
3.9. Anchoring, mooring and towing
15084
5.1. Inboard engines
8665, 9094 Part 1
5.2. Fuel system
10088, 7840
5.3. Electrical system
28849, 10133, 13297
5.4. Steering system
13929
5.5. Gas system
10239
5.6. Fire protection
9094 Part 1
5.7. Navigation lights
COLREG72
5.8. Discharge prevention
8099
(e.g. 28849 –harmonised standards)

H A N S E 3 7 0
1
Chapter 1 Safety Notes
1. Description of the Boat
1.1. General description
You can find the general description of the yacht in the standard specification and the
corresponding contract specification.
1.2. Main data
1
1.2.1. Main dimensions
Overall length LOA 11.25 m
Length of hull LH11.35 m
Length of hull on waterline LWL 10.05 m
Beam of hull BH3.75 m
Mast height 17.77 m
Draught (lower edge of the keel) Tmax
Deep keel approx. 1.95 m
Shallow keel (option)
2
approx. 1.60m
Sail surface2
Mainsail 42.50 m²
Self-tacking jib 28.60 m²
Storm jib (option) --------
Genoa 44.90 m² ²
Gennaker (option) approx. 100.00 m² ²
Total sail surface 87.40 m²
1
All dimensions, weights and surfaces are approximate values.
2
Depending on the contract specification.
1

H A N S E 3 7 0
2
Attention: The specified sail surface may not be expanded without prior
consultation with the shipyard.
Water displacement (empty vessel) mLCC approx. 6,250 kg
Fuel tank content 140 l
Water tank content 300l
Headroom cabin + 1.95 m
Maximum number of persons 8 Crew
1.2.2. Displacement and masses
Mass of the empty vessel
mLCC
6,520 kg
Mass of liquids in installed tanks
427 kg
Basic equipment
80 kg
Life raft
30 kg
Additional load (provisions)*)
350 kg
Personal equipment
120 kg
Number of persons (8 persons)*)
600 kg
Mass of the fully loaded boat –ready to sail
mLDC
8,130 kg
*) Included in the load capacity on the builder’s plate
Attention: The owner or skipper is responsible for ensuring that the
fully equipped boat does not exceed the mass according to the table
above.
1.2.3. Maximum number of persons and load capacity
The Directive stipulates that for each craft a recommendation be made as to the maximum
number of persons who should be on board when the boat in the sea territory it is conceived for.
This yacht is designed for the ocean, meaning extended voyages between ports.
.
We therefore recommend the following:
In case of voyages over the ocean lasting several days, no more than 8 persons should be on
board, since this corresponds with the number of berths.
This category is deemed appropriate for significant wave heights of more than 4 m and for wind
forces of more than 8 on the Beaufort scale, under the precondition that:
the crew possesses sufficient knowledge and experience;
the boat is satisfactorily built and its equipment is well maintained.

H A N S E 3 7 0
3
Attention: Life jackets must be provided for all persons on board. The
inflatable life rafts, with which the boat must be equipped, must
correspond to the number of persons on board.
Warning: The recommended maximum number of persons may not be
exceeded. No matter how many persons are on board, the total weight of
persons and equipment may never exceed the recommended maximum
load capacity.
Warning: The stability criteria of the watercraft are designed for the
specified masses and the arrangement and storage of the additional load
provided for in compliance with the regulations.
Persons using this boat should heed the following notes:
the crew members should be appropriately trained;
the boat should not be loaded beyond the limit recommended by the manufacturer;
water in the bilge should be drained to the greatest extent possible;
stability is reduced by heavy objects above the centre of gravity;
in case of rough weather, the hatches, locker seats and companionways must be kept shut to
keep the risk of water penetration as low as possible;
stability is reduced, if davits are used for towing or for lifting heavy weights;
breaking waves pose a serious danger to the lateral stability of the boat.
Attention: Weather conditions under which breaking waves could
approach the boat abeam are to be avoided. Therefore, voyages should
be planned taking the weather forecast into account.
Additional load g
The Directive stipulates that the maximum additional load be recommended by the manufacturer.
It comprises persons and the equipment marked with *) in. The maximum load capacity is
indicated on the builder’s plate. The maximum additional load for the “Hanse 370” is 1,200 kg.
Warning: The recommended maximum additional load must never be
exceeded when loading the watercraft. Loading must always be carried
out cautiously, distributing the load in such a way that the design trim is
maintained. Heavy items must be placed as low as possible.
The masses of fresh water and fuel were not taken into account in the maximum additional load.
.

H A N S E 3 7 0
4
1.2.4. Motorization
For details on the engine type and its technical specifications, please refer to the operating
instructions for the engine and the contract specification.
Max. power (EN ISO 8665) max. 29.5 kW (1224 PS)
Number 1
Cooling indirect (seawater/fresh water)
1.2.5. Electrical system
The yacht is equipped with an electrical system with 12 V direct current and a 230 V alternating
current system.
Do not make any changes to the electrical system or the circuit diagrams. Allow only trained and
instructed personnel to perform work on the electrical system.
Danger! Open the switchboards only when they are current free,
because you might contact live elements that are not protected by
fuses. There is a risk of electric shock.
Danger! There is a risk of fire and explosion when handling electrical
direct current (DC) and alternating current (AC) systems in an
improper manner.
2 3 0 V A L T E R N A T I N G C U R R E N T
Warning! Never perform work on a live alternating current system.
Heed the following notes:
If possible, only use electrical consumers with earthed conductors.
Connect metal housings or systems of installed electrical devices to the earthed conductor in
the boat (green or green with yellow stripes).
Attention: Never leave the shore-connecting cable hanging in the water.
This could injure or result in the death of persons swimming nearby!
Attention: To avoid electric shocks and to reduce the risk of fire
Do not modify the electrical system. Allow work to be done
on the electrical system only by qualified specialists for marine
electrical equipment!
If possible, only use devices that are insulated twice or triple
braided!
Switch the shore connection switch off first before plugging or
unplugging the shore connecting cable.

H A N S E 3 7 0
5
Connect the shore-connecting cable to the boat first before
connecting it to the shore source of power.
First separate the connection at the shore source of power.
If the reverse polarity display1is activated, disconnect immediately!
Close the cap of the shore connector box.
Do not modify the shore connections, only use compatible circuit
connectors.
12 V direct current
Batteries supply the current for the 12V installation on board.
Distribution occurs via the distribution fuse panel. The labels next to the switches designate the
respective consumers. If required, your dealer can provide the circuit diagram.
Changing the batteries
When removing the batteries, always disconnect the negative pole first and make sure that the pole
terminal does not come in contact with other parts of the electrical system! Take care not to
simultaneously touch both poles with the tool you are using, thus establishing an electric circuit.
Danger! Only use insulated tools to detach or fasten the pole
terminals at the batteries.
There is a risk of fire and injuries!
When connecting the batteries, take care to first plug in and secure the positive poles before
subsequently attaching the negative poles.
1.3. General plan
1.3.1. Description of the structure
Structure
The sailing yacht “Hanse 370” is a cruiser constructed using glass-fibre reinforced plastics, optional
in polyester or epoxy resin.2
The properties of all utilised materials comply with the requirements of classification societies or
ISO standards.
Should you require these materials or the accompanying data sheets, please contact your dealer.
Always maintain a sufficient distance to the sea bottom. On principle, it is not possible to take
severe collisions with solid underwater obstacles into account when dimensioning the yacht.
1
Depending on the contract specification
2Depending on the contract specification

H A N S E 3 7 0
6
Preservation
Osmosis protection is ensured by the use of an isophthalic acid gel coat and an isophthalic acid
resin for the hull laminate. In addition, areas of the laminate surfaces heavily exposed to water were
preserved with a top coat.
All parts not consisting of FRP are necessarily colour-preserved or consist of materials that are
corrosion-proof.
An antifouling painting system against incrustation by foreign matter should be applied to the
underwater body.
Deck covering
All areas of the working deck are provided with an anti-slip covering.
Fittings and hatches
All fittings and hatches are made of rustproof, saltwater-proof materials. To securely transfer the
arising forces, reinforcements are laminated into the deck at the places where the fittings are
mounted.
Note: Touching the sea bottom or collisions with objects below the waterline
can result in damage to the hull and thus impair its strength.
Fig. 1 General plan

H A N S E 3 7 0
7
The hatches and portholes as well as the windows are certified or in compliance with the
requirements or regulations such that they resist the impact of breaking waves.
Working deck
The boat’s working deck comprises the cockpit area, the gunwale and the forecastle (Figure 2).
Warning: Never enter the areas that do not belong to the working
deck when the boat moving. There is a risk of falling overboard.
It is generally recommended to secure persons on deck with personal rescue and safety equipment
(e.g. life jackets, safety belts.
Danger: When landing in the port or docking to other boats, as well
as when putting to sea, take care not to get caught between your boat
and the quay wall or the other boat.
There is no toe rail at the rear part of the cockpit. Please take note of this when you are there.
The sliding hatch at the companionway must not be stepped on!
Attention! Do not leave loose objects lying in the area of the
working deck or the emergency hatches. Secure all pieces of
equipment against sliding!
Guardrail
The boat has a surrounding guardrail with a top and bottom rail. Except for the bow and stern
pulpits, the top and bottom rails are made of stainless steel.
Hand-rails and boarding ladder
Additional hand-rails and the arrangement of the deck gear provide protection against falling
overboard.
The swing-out boarding ladder is at the transom. It extends below the waterline. Reboarding is
ensured by the boarding ladder. Acquaint yourself with the handling of the boarding ladder and
practice reboarding, e.g. in a man overboard manoeuvre (MOB).
Attention! Instruct the crew in this respect before setting off on a
voyage! We advise you against sailing the yacht alone (single-handed
yachtsman).
Fig. 2 Working deck

H A N S E 3 7 0
8
1.3.2. Furnishing plan
See Figure 3 (Interior furnishing variants).
Fig. 3 Interior furnishing variants

H A N S E 3 7 0
9
1.4. Drive system
1.4.1. Engine room, motoring
The engine room is located underneath the companionway from the deck to the saloon. All
aggregates necessary for running the boat are situated here.
The room encloses the installation and is ventilated by an air inlet and an air evacuation duct. The
engine room is lined with flame-resistant insulation. The engine room can be accessed either by
lifting up the companionway stairs and entering through a door located behind the stairs or
through a door in the stern cabin.
The drive shaft and other rotating components are provided with appropriate protective gear.
Danger! Never remove the protective gear from rotating
components while they are running. Never touch the rotating
components. Only step on the areas provided for.
Attention! The engine room is not stowage space. Do not leave
loose objects lying around. Store inflammable liquids in appropriate
vessels in boxes or locker seats in the outside area!
1.5. Safety notes
1.5.1. Flooding, watertight integrity
The sailing yacht “Hanse 370” is constructed with great care in accordance with established
technological regulations. However, external events, faulty operation or other unforeseen events
can lead to a risk of flooding and the sinking of the yacht.
The strength of the hull, its mounting parts and systems is dimensioned such that it securely resists
existing strain when travelling in the areas the boat is designed for.
It is necessary to drive and equip the yacht according to nautical rules. In some cases, the standard
equipment supplied by the shipyard may not suffice.
The watercraft is equipped with a self-draining cockpit so that water that washes over and rain
drain off to the outside.
If there is a risk of flooding, the hatches and openings must be shut in any case.
Attention! During the voyage, all portholes and deck hatches,
especially the stern hatch, must be shut!
Weather conditions to this effect should be avoided, and voyages should be planned according to
the weather forecast.
Observe the following notes:
Keep order on board so that the systems remain accessible at all
times!
Check the outboard openings and seacocks for tightness!

H A N S E 3 7 0
10
Keep the bilge systems in running order!
Equip your boat with leak stoppage material!
Stable buckets are an efficient help for draining.
Adapt your yacht to the given weather conditions!
In case of heavy weather, shut the hatches, windows and vent
holes (to the greatest possible extent)!
Do not undertake any technical modifications without
consulting the shipyard beforehand!
Ensure regular inspections and expertly repairs!
Avoid the risk of touching ground or stranding
1.5.2. Hull openings, seacocks
Openings in the hull are points that pose a risk of water penetrating to the inside. They require
your special attention.
They have been selected and installed according to established technical rules. It is necessary to
check their condition on a regular basis.
All underwater hull openings can be shut with seacocks. If you leave the boat unattended, they
should always be shut.
For safety reasons, the hose connections are always double. Do not change this!
Fig. 4 position hull openings
Through hull fittings such as echo depth sounders are specially constructed and cannot be shut by
seacocks.