Bollard Pull Test
Navaltech offers immediate availability and attendance of service engineers in order to perform your bollard pull test with our certified and calibrated dynamometers and load testing equipment.
Bollard pull tests are carried out in order to certify a tug boat as fit for service, by measuring its power output. The power output of a tug boat determines the pull or towing force it is capable of applying.
How is a bollard pull test performed?
The power output of a tug boat is the thrust developed at zero speed. In order to meet the requirements of their specialized operation, tug propulsion systems are designed for maximum performance at zero speed in the forward direction.
To simulate conditions in which a tug is expected to operate, the tug is tethered to bollards and a load cell is placed on the tethering line. The tug applies tension to the tethering line while the load cell measures the applied load. Having been tethered, zero speed and maximum output is possible.
For reliable results, bollard pull tests are ideally performed in deep water on a calm day with minimum traffic, to avoid any false readings due to currents or strong winds. It is important to keep conditions as static as possible, by ensuring sufficient distance between the tug and pier wall, maintaining rudder angle close to zero degrees, constant engine power and heading. The test continues until the reading on the load cell reaches a near-constant value.
Experience
Navaltech’s team members have all the necessary experience, knowledge and qualifications in order to carry out the necessary tests. All our service engineers have numerous years of experience in the field of the specific test and they are continually trained.
Immediate availability
Our team of highly trained and experienced service engineers is available 24/7 worldwide and can efficiently deliver the required service and ensure full satisfaction of our Clients and Classification Societies. Reliability is a key goal and value for our company, thus, we always make sure that there is constant availability of service engineers so as to undertake urgent requests at any time.
Inspections and Repairs
Lifeboat and Launching Appliances
Annual, 5' yearly Inspections and Repairs of Lifeboats and Launching Appliances.
Ultrasonic Thickness Measurements (U.T.M.)
Ultrasonic Thickness Measurement (U.T.M.) is a Non-Destructive Testing method through which we determine, using the appropriate equipment, the corrosion wastage in solid materials.
Cargo Gear Load Testing
Cargo Gear include all lifting appliances (cranes) used for cargo operations. Cargo Gear Inspection involves the visual inspection of all parts that compose a crane, as well as dynamic load tests, replacement of wires (if required) and Magnetic particle Inspection (M.P.I.) of main support bolts.
FFE/ LSA
Inspection of fire fighting equipment is a very significant project that needs to be undertaken only by the most experienced and qualified engineers. Flawless operation of the fire fighting equipment, that is inspected during said surveys, is very crucial for the maintenance of safety on vessels.
Accommodation / Pilot Ladders & Gangways
Ship ladders (pilot, accommodation, wharf) are required to be inspected (annually or 5-yearly load test) by an experienced and competent service engineer as per SOLAS & Flag Rules and Regulations.
Non-Destructive Testing (N.D.T.)
NDT (Non-Destructive Testing) is required by the owner or the Classification Society representative for particular structure items (welding seams, plates, propellers) to inspect the possibility for any structure failure (cracks, blow holes, cavitation, etc.).
Loose Gear Testing
Loose gear (i.e. grabs, shackles, chain blocks, pad eyes) are the equipment used on vessels for the necessary lifting operations. The inspection of loose gear is required in order to ensure the safe operation of lifting weights and also upon charterers’ request.
Ultrasonic Hatch Leak Inspection
Ultrasonic Hatch Leak Inspection is a Non-Destructive Testing (N.D.T.) whereby, with the use of the appropriate equipment, tightness of Hatch Covers can be tested against leakages which can cause charterers claims and affect seaworthiness of vessels.
Brake Hold Capacity Test of Mooring Winches
One of the most crucial inspections carried out onboard ships is the mooring winch brake test. Winches are critical equipment onboard ships and it is essential to monitor their performance.
Bollard Pull Test
Bollard pull tests are carried out in order to certify a tug boat as fit for service, by measuring its power output. The power output of a tug boat determines the pull or towing force it is capable of applying.
Repairs of Lifeboats (FRP & Inflatable)
A vessel’s lifeboats hull, whether made of Fiberglass Reinforced Plastic (FRP) or PVC or hypalon, occasionally can incur damages. In the event of damage, repairs must take place by a very experienced and well-trained service engineer who will ensure the best outcome of the repair.
Replacement of Wires & Socketing
Lifting appliances (cranes, ladders, etc.) may require steel wire replacement in the event of damage; in addition, lifeboat davits must renew their steel wire every 5 years, as required by Flag Authorisation and SOLAS Rules & Regulations
Lashing chains & Pots of Ro-Ro vessels / Pad eyes testing
Lashing chains and pots can be damaged by wrong use or as a result of the load moving in transit, hence the need to inspect them is very crucial.
Anchor Chain Measurements
Anchor Chain Measurements are required by Classification Societies or by the owner at every dry-docking. The purpose of these measurements is to monitor the corrosion wastage of the chain.
Steel Weight Estimation
Vessels and ships are exposed to harsh marine environments and over time are affected by the corrosion on their hull structure. This corrosion, if extensive, can cause serious damages to the endurance of the hull structure.
Yachting
The experienced staff of Navaltech recognises the significance of the special treatment and care that needs to be provided to yachts.
Certifications
View our Certifications
CLASS APPROVED
- Lloyd’s Register (LIFEBOATS / UTM / FFE / LSA)
- DNV (LIFEBOATS / UTM / FFE / LSA)
- NKK (LIFEBOATS / UTM / FFE / LSA)
- ABS (LIFEBOATS / UTM / FFE / LSA)
- BV (LIFEBOATS / UTM / FFE / LSA)
- RINA (LIFEBOATS / UTM / FFE / LSA)
- CCS (LIFEBOATS / UTM / FFE / LSA)
- RMRS (LIFEBOATS / UTM / FFE / LSA)
- INSB (LIFEBOATS / UTM / FFE / LSA)
- KRS (LIFEBOATS / UTM)
- IRS (LIFEBOATS / UTM)
MAKER APPROVED FOR LIFEBOATS , LAUNCHING APPLIANCES AND RELEASE GEARS
- Fassmer - Marland Ltd. / Hai Hong Boat Making Co Ltd.
- Qingdao Beihai HeavyShipbuilding Industry Co Ltd.
- Jiangsu Jiaoyan Marine Equipment Co. Ltd / Jiangyin Xinjiang F.R.P.Co.,Ltd.
- Jiangyinshi Beihai LSA Co.,Ltd.
- Sangsangin Industry Co. Ltd./ ex-Dongnam Marine Crane Co. Ltd.
- Oriental Precision & Engineering Co., Ltd.
- Wuxi Hai Hong Boat Making Co. Ltd.
- HXN (ZhejiangHengxin Ship Equipment Co., Ltd).
- DSB Engineering Co., Ltd.
- Wuxi Huahai Marine Equipment Factory.
- Wuxi Wenjiao G.F.R.P. Factory.
- Wuxi Dongwu.
- Wuxi Mingzi Machinery Manufacturing Co. Ltd. (Release gears –Hooks).
- Zhenjiang Marine Auxiliary,
- GEPA-Fiberglass Industry & Trade Co.Inc.
- Stoczna USTKA - Lifeboats & Launching Appliances,
- NOR-MAR FAR EAST Services,
- Jiangyin Neptune MarineAppliances Co. Ltd.
- Sezamor
- Jiangyin Wolong FRP Boat Co. Ltd.
- Gurdesan Lifesaving systems.
- Jiangsu Huaiyin Marine Machinery (Lifeboats, Release Gear & Launching Appliances)
- Wuxi XingSheng (Release Mechanisms)
- Shin Myung Tech
- Lalizas (Release Mechanisms)
- Narwhal (Rescue Boats)
FLAG APPROVED FOR LIFEBOATS , LAUNCHING APPLIANCES AND RELEASE GEARS
- Hellenic
- Bahamas
- Panamanian
- Liberian
- Palau