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STX-STM/CHR5, NSTM CHAP , BOATS AND SMALL CRAFT Survey
Crafts. Nstm Wooden Boats. Last Updated on Mon, | Administrative Policies. WOOD WORKMANSHIP.� Boats from Open Storage. The inspection shall be thorough and include probing in all the areas listed in paragraph A strake of planking or decking shall be removed to inspect the condition of the frame heads and beam ends (if present).� It is advisable if decay is evident or if a small amount of probing reveals decay, to pull strakes of planking or decking to inspect the condition of the inner planking (if applicable) and the frame heads in the stem transom areas on one side of the hull. If decay is found, remove a midships strake at the same level and similar strakes on the opposite side. �������������� ����� - Moar Boats Mod | ����� �������� ������, ������� ������, ���� ����� ������� � ����� ���������� �� ������������ ����� ����� �� ����. STX-STM Nstm boats and small craft vol 1 rev 8 15 Sale. Regular price $

This technical manual is intended for guidance of and use by personnel operating and maintaining the equipment described herein. This manual is divided into two volumes arranged as follows: Volume Publication No. All feedback comments shall be thoroughly investigated and originators will be advised of action resulting therefrom. Page , page If the davit has a Constant Tension winch system, do not enable constant tension mode during lowering until the boat is within 3 feet of the wave tops.

If the system should malfunction and shift into constant tension before the boat touches the water, the boat will free fall the distance to the water, possibly resulting in personnel injury or death.

Page When launching a boat using double arm davits, always release the stern hoisting hook before releasing the bow hoisting hook. Releasing the bow hook first could allow the boat to broach and swamp or capsize, resulting in personnel injury or death.

Page When recovering a boat using double arm davits, always engage the bow hoisting hook before engaging the stern hoisting hook. If stern hook is attached first, the boat could broach and swamp or capsize, resulting in personnel injury or death. Page Personnel should not stand in line with any lines under tension. Should a rope or fitting fail, it could recoil with considerable force. Failure to comply may result in injury to personnel.

Page , page vii. Page , page Do not attempt to hoist or lower the static test weight with the davit winch. Page In the event of a component failure, the load may drop uncontrollably. If possible, maintain a safety rig on the test weight with a crane. Page , page Do not apply manual brake suddenly when stopping the test weight. Page , page , page Care should be taken to avoid damaging the water bags or load sensors as the bags are positioned over the side of the ship.

Page , page viii. The purpose of this section is to provide technical information to personnel engaged in the supervision, operation, or maintenance of boat handling launch and recovery systems.

Included in this section are the accepted terms and definitions used in conjunction with boat handling and stowage systems; guidance concerning pre-weight test inspections and testing requirements; amplified general safety requirements; general operational procedures for boat handling launch, recovery, and stowage systems; and reference information intended to reduce interpretation errors concerning the requirements of boat handling and stowage systems BOAT HANDLING DESIGN TYPES.

There are various types of boat handling, launch, and recovery systems currently in use to accommodate ship mission needs. The most Nstm 583 Boats Small Craft Use common boat handling types are over the side, stern ramp, and stern hoist. Each of these types is available in various designs and configurations.

When using this manual for guidance, it is therefore important to properly identify the type, design, and configurations of the boat handling system in question. The types and associated configurations are listed in Table Some of the boat handling designs and configurations identified are configured to handle and stow multiple boats. There are four boat stowage types: deck mounted, dolly, overhanging suspended, and davit mounted.

Specific information regarding stowages is provided in paragraph. A typical boat davit functional block diagram is depicted in Figure This diagram, while not exact for every boat handling configuration used in the Navy, is representative of a typical boat handling system.

The terms utilized in this section are listed and defined in the following paragraphs in alphabetical order. A rigid hoisting fixture fitted to the boat for lifting at a single point. Boat hoisting slings are made up of two or more flexible appendages. One end of each appendage is attached to a common hoisting ring and the other end is attached to the boat hoisting fittings. Over the side handling systems are generally referred to as a davit.

A davit is a winch and support structure designed to move a boat from an inboard stowed position to a point outboard of the ship s side from which the boat may be lowered to the water and launched. The reverse of this process occurs when the boat is hoisted and recovered.

Cranes used to launch and recover boats are limited to lower sea states and ship speed than davit systems. Davits are equipped with motion compensation devices for safer launch and recovery in higher sea states.

Cranes lack this capability. Davits are specifically arranged for ease of line handling and sea painter rigging. Cranes do not have dedicated line handling cleats. Cranes are sometimes located on the deck in a location that restricts aspects of safe launch and recovery. Obstructed views, limited compartment space, and tripping hazards increase the level of risk when utilizing a crane for over the side boat launch and recovery.

Dependent on the ship s hull design, stern hoist systems can be at a fixed launch and recovery position at the stern of the ship or consist of a boom or set of booms that extend beyond the transom to launch and recover the ship s boats.

Stern ramp systems utilize a ramp located at the stern of the ship that is designed to allow the boat to move from within the ship and down a ramp to a point at which the boat becomes waterborne and can be launched from the stern of the ship.

The reverse of this process occurs when the boat is recovered. The ramp angle may be fixed or pivoted depending on the design of the ramp. How the boat moves up or down the ramp is dependent on the launch and recovery design.

A horizontal spar, strut, or other long member, extending from the hull of the ship, to which boats are moored. The report of inspection shall be entered in the ship s log and include inspection of the boat engine, hull, lights, boat gear, and emergency equipment, and a test of the fog signal.

A davit having two arms, falls, and hoisting hooks. With this type of davit, the boat is suspended from two points. A davit requiring the application of an external force other than gravity to move the boat from the inboard position to the outboard position and to lower the boat to the water. The structure of this davit is fixed over the side of the ship and allows for the boat to be directly lowered and hoisted from this position.

A davit consisting of an arm or arms which pivot around a single axis to move inboard and outboard. Refer to Figure. A gravity davit consisting of two arms which pivot around multiple axes through links to move inboard and outboard. A davit having one arm, fall, and hoisting hook. A davit with a single arm or boom. The davit arm is mounted on a pedestal and rotates about a vertical axis when moving the boat outboard and inboard in a slewing type motion. This type of davit operates similar to a crane.

These davits differ in specific design and operating features and procedures. The falls consist of the hoist rope, end fittings, blocks, links, and boat hook s. Paying in and out of the falls is controlled by the davit winch to hoist and lower the boat. A typical falls is shown in Figure.

A weighted sheave arrangement installed in the davit falls reeving arrangement. Its weight is enough to counterbalance and lift the hook s clear of the boat and its crew when launching the boat.

A typical falls tensioning device is shown in Figure Falls tensioning devices are not employed on davits with Constant Tension CT winch systems. Refer to paragraph for CT winch description. For boat handling, a fid is a hardwood tapered pin or dowel that is used to secure the sea painter to the bow of a boat.

The fid is used as a toggle over the eye and under the standing part of the painter line and provides the capability to quickly release the sea painter from the boat during a launch operation GRIPE. An adjustable rope or strap assembly used to secure the boat to its stowage system by wrapping around the boat and securing to the davit or deck.

Gripes shall be of the quick disconnect type, constructed of corrosion resistant steel CRES , and readily accessible.

The hook is used to connect the boat sling or attachment point to the davit falls. Some davit arrangements have more than one boat hook. There are several types of boat hooks currently used by the Navy. This hook type is used on most boat davits in the Fleet. The most common manufacturer of this type of hook is Vestdavit who provides the hook in two load capacities as shown in Table These hooks offer operators the split-second release control often needed at sea, and include a self-locking feature which prevents release while under full load.

A line spliced into the sea painter near the eye splice end of the sea painter. It is used during launch and recovery of boats as a means to deploy and retrieve the sea painter from the water once the painter is no longer connected to the bow of the waterborne boat.

Synthetic ropes made up with a series of overhand or figure-eight knots evenly spaced 18 to 24 inches apart. When installed, the ropes are typically attached to the davit arm or overhead sponson depending on the shipboard arrangement. The boat crew can use the manropes for additional safety during hoisting and lowering of boats. The installation and use of manropes is optional and should be determined based on the boat handling configuration. The use of manropes on some davit configurations SLADs was deemed a safety hazard during operations because of fouling of the ropes with boat and deck mounted equipment as the davit arm traveled to its stowed to launch position.

Pendants are typically used when handling boats with cranes only outfitted with heavy hook blocks, not remote release hooks. Pendants are designed for easy engagement, proper fit, and suspension from the crane. The typical pendant fabrication consists of a synthetic rope or strap, rigging hardware, and a quick release hook refer to Figure. The quick release hook shall be compat.

The overall length of a pendant varies on crane configurations. Use of a remote release hook actuated from the deck of the ship provides safety to the boat crew due to the falling of the sling assembly once released from the hook. Disengagement and engagement of the boat handling pendant remote release hook can be accomplished by use of a safety runner and tripping line, made up as follows: The hook shall have a small ring attached to its bill through which a shackle is passed.

The safety runner, an foot long wire rope, is connected to the shackle in the bill of the release hook. The tripping line, a foot minimum length , 3-inch circumference fiber rope in accordance with MIL-R , shall be connected to the other end of the safety runner by a shackle.

The tripping line length is selected to allow operation of the tripping line from the ship s deck and the boat sling to be engaged and disengaged from the pendant hook remotely while the boat is waterborne. For launching, the safety runner is passed under the boat sling lifting ring in the throat of the release hook so that it can be tripped out remotely by the deck crew when the boat is waterborne. During recovery, the safety runner is disconnected from the tripping line by the boat crew, passed through the boat sling lifting ring, and reconnected to the tripping line, enabling the deck crew to remotely lift and engage the boat sling into the release hook.

This device permits a hard point connection between the crane boom tip and RIB s rigid bail. An adjustable wire or fiber rope assembly used for additional safety or security when the davit arm s is in the stowed position.

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