S C H O T T E L N AVIG ATO R - Schottel GmbH

YOUR PROPULSION EXPERTS 

SCHOTTEL NAVIGATOR 

THE COMPLETE PROPULSION UNIT 

NAV · SCHOTTEL NAVIGATOR 

The reliable and compact 

propulsion unit consisting of 

Rudderpropeller and engine.

2 3 

SCHOTTEL NAVIGATOR – THE 

COMPLETE PROPULSION UNIT 

For more than 50 years, the SCHOTTEL Navigator (NAV) has 

been a byword for a reliable and compact propulsion unit suitable 

for use on an extremely diverse range of vessels. In principle 

the NAV, an adaptation of the SCHOTTEL Rudderpropeller 

(SRP), is a largescale mobile outboard plant, providing the 

vessel with 360 degrees steerable manoeuvrability. 

COMPACT DESIGN 

All main components of the SCHOTTEL Navigator are 

mounted on the base frame, which also accommodates the 

daily fuel tank. A canopy protects the complete unit. A diesel 

engine is used as the prime mover. The electrical and electronic 

monitoring elements are installed in an integrated switch 

cabinet. The clutch between the prime mover and the Rudderpropeller 

transmits the power through a flexible coupling and 

a universal shaft. 

PROPULSION: 

RUDDERPROPELLER (SRP) 

The SCHOTTEL Rudderpropeller is mounted at the rear end of 

the base frame and can be hydraulically raised or lowered in 

vertical direction by means of a depth adjustment facility. This 

serves to ensure maximum propeller thrust with all vessel 

draughts by maintaining the correct propeller immersion. For 

maintenance purposes, the Rudderpropeller can be pivoted 

to the rear using hydraulic or mechanical lifting devices. The 

propeller is equipped with an anti-cavitation plate to protect it 

from damage, or alternatively with a nozzle, if higher bollard 

pull is required. 

SIMPLE INSTALLATION 

Installation is fast and simple, since the Navigator merely has 

to be bolted onto a foundation prepared by the shipyard. Thus 

every kind of floating object can easily become motorized. The 

NAV is characterized by its wide variety of applications. As an 

extra service SCHOTTEL offers installation drawings according 

to the customer’s requirements. Our sales and engineering 

teams will be happy to provide assistance and advice. 

FLOATING CRANE SCALDIS VAN SEUMEREN 

4 x SCHOTTEL Navigator Type NAV 330 (465 kW each) 

GRAB DREDGER BODENWERDER 

2 x SCHOTTEL Navigator Type NAV 110 (146 kW each)

PG 11 

Z 

M 

LS 

A 

A 

R P 

B 

B 

u. 

L1 

B 

S 

X 

63 

228.6 

NAV · SCHOTTEL Navigator 

Switch box 

Silencer 

Forced air cooling 

(optional) 

Clutch with 

elastic coupling 

Diesel engine 

Hydraulic pump PTO 

Tension rod 

Cardan shaft 

Hydraulic cylinder for 

swing-out function and 

depth adjustment 

SCHOTTEL Rudderpropeller SRP 

Swing-out angle 

a7 

a7 

Thrust bearing 

Hydraulic unit 

Battery 

box 

Hydraulic 

hand pump 

Base frame 

with integrated 

daily tank 

Speed control 

SCHOTTEL Speedronic 

(optional) 

NAV 330 

Air intake 

Chassis, 

optionally with 

sound insulated 

incl. air inlet 

Tank vent 

ADVANTAGES 

Doors 

• Self-contained propulsion package 

• Compact unit 

• For virtually any watercraft 

• Fast installation 

• Easy maintenance 

• 360° manoeuvrability 

• Powerful unit

4 5 

APPLICATION ORIENTED 

PRODUCT VARIANTS 

All NAV variants can also be supplied with a ducted propeller. 

Rudderpropellers without nozzles are fitted with an anticavitation 

plate over the propeller to prevent air intake. 

NAV ONATRA 

The simplified version of the SCHOTTEL Navigator, Onatra (see 

fig. Barge installation), comprises the steering and propulsion 

system without motorization: a Rudderpropeller fixed to a 

vertical frame welded to a base frame, with the hydraulic unit, 

battery box and switch cabinet. The clutch, hydraulic pump, 

cardan shaft and control panels are supplied separately. 

The engine bed and canopy are supplied by the shipyard. 

NAV Sound-insulated incl. SRP hood 

NAV BASIC 

The NAV Basic comprises the diesel engine, the exhaust gas 

system, the engine piping and cabling, and the daily fuel tank 

embedded in the base frame construction. Furthermore, the 

NAV Basic is protected by a steel sheet canopy painted to the 

customer’s specifications. The shipyard only has to provide the 

connections for fuel to the main tank, for electric connection to 

the bridge and for cooling water, if required. 

NAV SOUND-INSULATED 

The sound-insulated version consists of an enclosed, insulated 

canopy, thereby reducing the level of air-borne noise to a mere 

of about 85 dB(A) at a distance of one metre. 

NAV OFFSHORE 

For demanding offshore conditions the NAV Offshore is 

characterized by an enclosed version of the canopy. The frame, 

canopy and doors are galvanized to prevent corrosion. 

The upper part of the Rudderpropeller can also be protected 

by an additional cover. The interior is cooled by an extra ventilation 

system. 

NAV RESILIENTLY MOUNTED 

For special vessel applications reduction of the structureborne 

noise may be necessary. For such cases SCHOTTEL 

offers resilient mounting of the NAV and the thrust bearing.


NAV 170 Sound-insulated 

Diagonal installation 

HYDRAULIC GRAB DREDGER 


Barge installation with NAV Onatra 



Hopper barge installation

6 7 

STEERING SYSTEM AND 

MOTORIZATION 

Propulsion systems are only as good as their steering. Optimally 

adapted data exchange between the different components 

is therefore top priority. A further priority is a user 

interface that is as intuitive as possible, enabling safe manoeuvring. 

Here too, SCHOTTEL steering systems set the course, 

both literally and figuratively. 

SST 600 WITH COPILOT 2003 

This is a full follow-up way-dependent electro-hydraulic 

redundant steering system, including a time-dependent 

emergency steering system. This steering system operates 

proportionally. This means that small steering angles are 

electronically transformed into smooth steering movements 

and large steering angles are transformed into fast steering 

movements including an acceleration and deceleration ramp. 

MOTORIZATION 

The SCHOTTEL Navigator is supplied with a diesel engine. The 

engine speed can be regulated by SCHOTTEL speedronic, an 

electro-mechanical system. Otherwise regulation is possible 

using a 4-20 mA or 0-5/10 V signal. 

PG 11 PG 11 

SRP 330 

hydraulic pipes 

electric cable


WATER INJECTION WORKBOAT (WIG) HOL BLANK 




DUMP BARGE ZINGST 


DUMP BARGE SATO GALICIA 

2 x SCHOTTEL Navigator 330 Offshore (je 540 kW) · 1 x SPJ 132 T (555 kW) 

DOUBLE ENDED FERRY 


DOUBLE ENDED FERRY FLAMINGO 


SOUNDING VESSEL VISURGIS 

1 x SCHOTTEL Navigator Type 110 NAV sound-insulated (182 kW) 

DUMP BARGE ACANTO 

2 x SCHOTTEL Navigator Type NAV 330 (537 kW each) · 1 x SPJ 57 RD (172 kW)

PROFESSIONAL 

PARTNERSHIP – 

THROUGHOUT THE 

VESSEL’S LIFE 

As a SCHOTTEL customer, you benefit from 

individual, in-depth advice and support at all 

stages of a project, from planning and commissioning 

through to preventive maintenance. 

A dense worldwide service network is ready 

to offer assistance and ensures the swift 

supply of spare parts – along with experienced 

SCHOTTEL technicians if required. 

The name of SCHOTTEL traditionally stands 

for quality in engineering, with over 90 years 

of experience in design and the precision 

workmanship of a family-owned enterprise. 

Our innovative propulsion systems are a 

byword for reliability and high performance 

and set standards in global shipping. 

YOU CAN FIND US HERE 

SCHOTTEL GmbH 

Mainzer Str. 99 

D-56322 Spay / Rhein 

Germany 

Tel.: +49 (2628) 61 0 

Fax: +49 (2628) 61 300 

24 h Service Hotline 

+49 (171) 47 29 154 

For further adresses: www.schottel.de 

© SCHOTTEL 08/2010

S C H O T T E L N AVIG ATO R - Schottel GmbH

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