07128895
DET NORSKE VERITAS 
TYPE APPROVAL CERTIFICATE 



CERTIFICATE NO. P-13117 
This Certificate consists of 5 pages
This is to certify that the
Ballast Water Management System
771.91
with type designation(s)
OceanSaver BWMS
Manufactured by
OceanSaver AS
LYSAKER, Norway
is found to comply with
IMO Resolution MEPC.125(53), IMO Resolution MEPC.126(53) and DNV Type Approval 
Programme No.771.91 
Application
This is to certify that the Ballast Water Management System listed below has 
been examined and tested in accordance with the requirements of the 
specifications contained in
the Guidelines and DNV Rules stated above. This certificate is valid only for 
the Ballast Water Management System referred to above. 
The certificate is issued on behalf of Norwegian Maritime Directorate

      Place and date This Certificate is valid until
      Høvik, 2009-04-08 2013-04-08
      for Det Norske Veritas AS  
         
         
       Øivin Lorentzen   Jad Michel Mouawad 
      Head of Section Surveyor

Ballast Water Management System Supplier
OceanSaver AS
Under type and model designation
OceanSaver BWMS - C3T
Equipment / Assembly drawings
Ballast Water Management System manufactured equipment / assembly drawings 
referred to under Type Approval documentation below.
Product description
The OceanSaver BWMS consists of the following components:
- C3T cavitation unit
- C2E disinfection unit with rectifiers
- TRO neutralization system
- Control, monitoring, automation and data storage system
- Nitrogen generator
- Compressor for the Nitrogen generator
- Filter unit
- Ejector unit for the nitrogen
- Control pressure valve (CPV) for back pressure management
The components have their operational specifications as tested during the 
shipboard testing listed under Application\Limitation below.
Application/Limitation 
Treatment Rated Capacity: 600 m3/h
The Treatment Rated Capacity corresponds to the type and model: OceanSaver BWMS 
C3T with 18 C3T sub-units as tested during ship board testing in accordance with 
the G8 Guidelines of the Convention.
Although not tested, other model designations with higher or lower flow rate 
have been documented in teoretical studies to have killing rate in compliance 
with the D-2 standards of the convention. The teoretical studies are given in 
OceanSaver (OS) - BWMS "Scaling by duplication" dated 2009-03-31 and operating 
range of the different models of the OceanSaver BWMS is given in "OS - Applied 
operating range", Rev. 3, dated 2009-03-31. 
The following operational specifications apply for the different components:
C3T cavitation unit
Minimum flow rate: 540 m3/h; with differential pressure between 1.6bar and 
2.4bar for the model tested during ship baord test.
C2E disinfection unit
The hydrogen trap and ventilation of the C2E unit, together with all electrical 
and electronical sensors in the C2E unit must be installed according to the P&ID 
diagram approved by DNV. See reference in Type Approval documentation below.
TRO neutralization system
Reference is made to "TRO Neutralization Unit", Document ref. 41101-DS-01 issued 
2009-03-16.
Control and monitoring system
The control and monitoring system included in the Type Approval consists of:
- Personal computers A3300M, covered by type approval certificate A-10538
- Measurement converter, PR Electronics AS, covered by type approval certificate 
A-9898
- Programmable electronic system, Rockwell automation, covered by type approval 
certificate A-10217
- Programmable electronic system, Micrologix 1762 and 1763 series, covered by 
type approval certificate A-10434
- Rectifier units, FlexKraft (3-5M) and (6-10M)
EMC: A 
Humidity: A
Vibration: A
Temperature: Up to 40 deg C
Automatic control of the process according to requirements in IMO MEPC.58/23 
ANNEX 4 Guidelines for approval of ballast water management systems (G8) have 
been verified.
Nitrogen generator with ejector unit
Volumetric injection rate is 7% of the total ballast water flow rate.
Nitrogen purity must exceed 98%.
Filter unit:
The type approved system includes a Bollfilter Automatic Filter Selfclean type 
6.18.2 BWT with wedge type wire mesh 50 microns. The application of any filter 
mesh type or size that gives documented better efficiency than the tested 
filter, provided within the operational limits for the CT3 unit (with respect to 
water flow and pressure) will be accepted under this type approval.
Installation
The installation of the system shall be in accordance with the principles of the 
P&ID diagram approved by DNV. See reference in Type Approval documentation 
below.
Installation onboard tankers with low flash point products and cargo pump room
The installation of the system onboard tankers (oil tankers, chemical carriers 
and gas carriers) with low flash point products and cargo pump room shall be 
done in accordance with the P&ID diagram no. BWT-PID-005-01 Rev.0 "BWT System - 
Arrangement for Tankers with pump room" Approved in Principle by DNV on 
2009-01-19.
Type Approval documentation 
- Land based testing of the OceanSaver ballast water management system of 
MetaFil As - Final rapport, Report Report SNO 5529-2008 reviewed by DNV on 
2008-02-29.
- QAPP for shipboard tests with shipboard test results reviewed by DNV on 
2009-02-12.
- Ballast Water Management System - User Manual (Parts 1 & 2) approved by DNV on 
2009-03-06.
- G9 Final Approval Application.
- Report of the Marine Environmental Protection Committee on its fifty-eightth 
session, MEPC 58/23.
- OceanSaver Type approval onboard testing, Survey Report no. 
HOVHA/2008-11-21-J-
- Quality assurance project plan reviewed by DNV on 2007-10-18
- OceanSaver Plan I and OceanSaver Plan II (Quality assurance manual - BWT 
system details) approved by DNV on 2007-10-18
- Drawing No. APPROVAL-PID-500-01 Rev. 1 "BWMS Piping and Instrument Diagram" 
approved by DNV with comments.
- Drawing No. H2-APPROVAL-PID-500-01 Rev. 1 "H2 venting principle" approved by 
DNV with comments.
- OceanSaver BWMS Type model and configuration Rev. 3 dated 2009-03-31.
- OS - BWMS "Scaling by duplication" dated 2009-03-31.
- "TRO Neutralization Unit", Document ref. 41101-DS-01 issued 2009-03-16.
Tests carried out
The Certificate is issued based on submitted documentation in form of approved 
QAPP, QMP and test results reports from UNIFOB. DNV has witnessed a function 
test of the system.
Landbased testing in accordance with IMO Resolution MEPC.125(53) verified by DNV
Shipboard testing in accordance with IMO Resolution MEPC.125(53)
Active Substance approval testing in accordance with IMO Resolution MEPC.126(53) 

Factory Acceptance Test and Extended Factory Acceptance Test of the control and 
monitoring system verified by DNV
Marking of product
For tracability of this type approval, each treatment system is to be marked 
with:
-Manufacturers name or trade mark
-Type designation 
-Serial no.
Certificate retention survey
For retention of the Type Approval, a DNV surveyor shall perform a survey every 
second year and before the expiry date of this certificate to verify that the 
conditions of the type approval are complied with.
Copy of type approval certificate
A copy of this Type Approval Certificate should be carried on board a vessel 
fitted with this Ballast Water Management System at all times. A reference to 
the test protocol and a copy of the test results should be available for 
inspection on board the vessel. If the Type
Approval Certificate is issued based on approval by another Administration; 
reference to that Type Approval Certificate shall be made.
END OF CERTIFICATE



Notice: This Certificate is subject to terms and conditions overleaf. Any 
significant change in design or construction may render this Certificate 
invalid.
If any person suffers loss or damage which is proved to have been caused by any 
negligent act or omission of Det Norske Veritas, then Det Norske Veritas shall 
pay compensation to such person for his proved direct loss or damage. However, 
the compensation shall not exceed an amount equal to ten times the fee charged 
for the service in question, provided that the maximum compensation shall never 
exceed USD 2 million.In this provision "Det Norske Veritas" shall mean the 
Foundation Det Norske Veritas as well as all its subsidiaries, directors, 
officers, employees, agents and any other acting on behalf of Det Norske 
Veritas.



DET NORSKE VERITAS AS · VERITASVEIEN 1, 1322 HØVIK, NORWAY · TEL: (+47) 67 57 99 
00 · FAX: (+47) 67 57 99 11 