Gnom Rov GNOM PRO Operator's Manual

Underwater remotely

operated vehicle for inspections

GNOM PRO

Operators manual

2017

2

TABLE OF CONTENTS

Warning !!!

Hi voltage on cable!
Do not touch the cable in a water during operation!
If any damages happen on a shield of cable it must be repaired or
changed !
Attention! AC power maximum 240V !

1. Description 3

1.1 Purpose 3

1.2 Technical specifications 4

1.3 Basic complete set 5

2. User’s manual for operation with GNOM 6

2.1 Surface control module 6

2.2 Deployment 8

2.3 Operation 10

2.4 Keys and Buttons at the control panel 12

2.5 Screen modes 13

3. Maintenance operation 14

4. Safety requirements 15

5. Warranty statement 16

6. Appendix 17

3

1. DESCRIPTION

1.1 PURPOSE

LIST OF ABBREVIATIONS:

Underwater module
Surface control module

Protection polypropylene frame
Hand reel
Joystick
Digital video recorder
Computer
Monitor
Waterproof case

Grabber

sector sonar

USBL positioning system

Remotely operated underwater vehicle GNOM is intended for inspection of underwater wrecks
and other objects by video camera.

The modern computer and telecommunication technologies are used in the device, and made it easy
in handling, compact, light and inexpensive.

These solutions allowed to use flexible communication cable for transmission data, power and video
signals to/from vehicle. The special Kevlar threads have been used to improve the cable's tensile
strength. Because of this fact, the device keeps the highest degree of stabilization what is very
important for inspections. The vehicle has a good maneuverability and can easily turn on the spot.

High-effective electric motors with magnetic couplings and hi-tech electronics are used in the vehicle,
provide the fast speed of the GNOM with low power consumption.

One of the most important features of this device is a possibility to operate it from PC and via
Lan/Internet.

The GNOM, in essence, an underwater helicopter with the video-camera which moves in any direction
according to the operator's instructions.

Thrusters are DC motors which are put into the aluminium halls. The rotation transmision to the screw propeller is
realized with aid of magnetic coupling disks.

One disk is fastened at the motor's shaft in the body, and the other one – at the screw propeller's shaft inside the
cone-shaped head, which is filled up with water. The cone-shaped head may be removed by operator for cleaning
( see manual).

The vehicle is connected with the operators console via thin cable, which transmits power voltage, operation
instructions, data and video signal from the vehicle.

4

The cable with diameter 6mm is stregthened by Kevlar threads (breaking effort is 200kg) and by additional
polyehylene shield. The cable length is max up to 400m. To compensate the weight of vehicle and give neutral
buoyancy to it, the float made of foam polysyren is used, and it is put in front part of vehicle. Similar floats can be
put on the cable to change the neutral buoyancy to little positive buoyancy. Maximum operating depth of vehicle
is 150m.

Using the control pads and joystick the operator can move GNOM forward-backward, turn to the right – left, up –
down; adjust the thruster speed and the lights brightness. All data is displayed on the monitor in "TV-text" mode.
By pressing one of the buttons on the joystick the operator can pass to the menu of tuning up some vehicle's
functions – calibrating of the depth sensor and the compass as well as some other functions.

1.2 TECHNICAL SPECIFICATION

Speed:

horizontal motion, up to 1,5 m/s
vertical motion, up to 0.5 m/s

laterial motion, up to 0.5 m/s
(above numbers depend on a length of pooling cable)
Max operating depth 150 m
Power voltage 100-230VAC 2000 Watts
Operating temperature range from -5…+45°C
Operating environment humidity, up to 100%
Weight of the vehicle 25 kg
Full weight of the system 100 kg
Dimensions of vehicle 600х380х400 mm

Tether:

diameter 10 mm

length up to 400m

5

1.3 BASIC COMPLETE SET

Underwater module
Surface control
module

Hand reel with
tether

6

2. USER’S MANUAL FOR OPERATION

2.1 Surface control module

Front panel of module

Settings and

diagnostics menu

Joystick socket

7

Left side of module

Right side of module

Additional videoout

Sonar communication

Tether plug

230VAC

(transformer)socket

RCBO

Power on/off