House- Ship Handling Flashcards
What is the approximate position of the vessels pivot point, when the vessel is making headway?
When the vessel is making headway the position of the ships pivot point is established approximately 1/4 Length from forward.
When a vessel undergoes ships trails, a turning circle to port and to starboard is usually conducted. Assuming the calm conditions are the same and the vessel is fitted with a single right handed fixed propeller, which turn would be completed tighter and quicker?
A turn to port would normally be expected to be tighter and quicker than to starboard, assuming conditions are the same.
When operating astern propulsion, how would the ships master know that the vessel is actually making stern way through the water?
Observation from the bridge wing of the water surface, would indicate that the stern wake is moving forward towards the midships position. This indication would show the propeller position has moved aft, away from the agitated water and is actually moving the vessel astern
When is the rudder considered effective?
When a stream of water is passing aft of the rudder position.
When conducting a turning circle, which is the larger diameter scribed?
A. Tactical diameter
B. Final Diameter
A.) the tactical diameter is the larger of the two.
If a vessel is required to complete a round turn when engaged operationally, what features and characteristics would affect the size and quality of the turn?
- ) light or loaded condition
- ) If the vessel is trimmed by the stern
- ) If the vessel is not upright and carrying an angle of list the turn would take longer and turning towards the angel of list would increase the turn size. Beam of the ship will effect the turn. A narrow beam vessel will turn tighter that a board beam vessel
- ) additional factors including, depth of water, draught of ship,speed of vessel and the type of rudder being employed
What shipboard elements are under the control of the masters and marine pilots when involved in practical ship handling?
1) Engines and propulsion power
2) Rudders and steering elements
3) Anchors
4) Mooring ropes and lines
5) Tugs when responding to command control
6) Bow/ stern thrusters
What elements are not under control when involved in ship handling?
Wind, wind direction and force, visibility, tides and current flows, depth of water, man made structures such as bridges, geographic obstructions like narrows and islands, and other traffic
When operating astern propulsion with a right handed fixed pitch propeller the ships stern will pay off, either to port or starboard because of the effects of transverse thrust. Which direction will the stern move when operating astern a right handed fixed pitch propeller, with rudder amidships?
The stern will move to port and the bow to starboard because of transverse thrust effects
What do you understand by the term “headreach”?
Headreach is described by the distance a vessel will move forward over the ground after the main engine has been stopped.
When involved in maneuvering the vessel, what personnel would you expect to be involved in the bridge team?
The master (team leader), the marine pilot, the officer of the watch, the helman, the lookouts and an engine room contact. Additionally a communications officer and or a radar observer
When taking up an aft or forward mooring station, what would the expected duties of the deck officer be?
Clear communication with bridge, ensure crews safety, prepare any heaving lines, stopper arrangements, mooring lines intended for use
When picking up the marine pilot from a pilot launch, what preparations should be made ready at the boarding station?
pilot ladder/ accommodation ladder, man ropes, lifebuoy, heaving line. Ensure all is properly deployed
What international code signal flag should be displayed by the ship, once the marine pilot has boarded and taken the conn?
“H” flag (hotel flag) indicating there is a pilot onboard
When a vessel is approaching an anchorage, what preparations would you expect the anchor party to carry out, before working the anchors and cables?
Anchors placed in gear and securings cleared away, anchor walked out of hawse pipe for let go, windlass taken out of gear and hold anchor on brake,
A marine pilot is delivered to the vessel by helicopter. What preparations would the heli deck landing party carry out, prior to commencing a hoist operation?
lowering of all exposed high rigging, deck space and surrounding areas cleared of any loose materials, a wind sock or flags deployed to show wind direction to helicopters pilot, designate hook handler and equip them with rubber shoes, rubber gloves, an an insulated static hook rod. Rescue boat turned out ready for emergency launch.
When weighing anchor what relevant reports are passed from the forward station to the bridge?
Direction of which way the anchor cable is leading, when anchor is aweigh, confirm anchor is sighted and clear, once anchor is stowed and secured for sea.
When a vessel is expecting to take tugs forward and aft, what information will the officers at these stations require?
1) whether the tugs or ships line is to be deployed
2) what lead is required to secure the tug by
3) what method of securing to the bitts is required (figure eights or eye to bollard)
When maneuvering in close proximity to small craft, like pilot launches and tugs, what is considered the main danger and hazard?
When small craft of any kind are engaged with a larger, parent vessel the main danger is from the forces of interaction between the two crafts
Following an emergency at sea, like an onboard fire, what operational stations would you expect to be manned and brought to an alert status?
With most sea-going emergency incidents, the bridge team would be called in and engine room would be placed on immediate standby. Depending on the nature of the incident then emergency parties, for damage control, rescue boat crew, a fire party of first aid party or a combination of these could expect to take up and standby
How could a vessel turn around sharply in a river?
A vessel can achieve a tight turn by “snubbing around” on the ships anchor. Alternatively, depending on the amount of sea room, the vessel may be able to carry out a short round turn.
What do you understand by the term “dredging the anchor”
This is the deliberate act of paying out an anchor, usually at short stay, with the intentions of dragging the anchor on the bottom with the motion of the ship. It is often employed when approaching a berth as a means of slowing the motion of the ships head movement.
Why would a Baltic moor be considered to normal berthing alongside?
A Baltic moor is an option when the vessel is faced with an unfendered concrete quay, which could damage the vessels hull plating or a ship damaging a weakly constructed jetty.
A vessel is secured alongside in Honk Kong when the port authority issues an “All ships” warning of an impending tropical storm. What options are available to the master and which option is most favored?
A. Secure the ship, let go moorings and run for the open sea
B. Move the vessel to a storm anchorage
C. Secure the vessel and remain alongside
When carrying out a running moor, which anchor would be released first.
The vessel should be stemming the tide and have both anchors ready for deployment, the weather anchor should be deployed first (sleeping cable) this would be payed out to the desired scope and then the leeward anchor could be deployed second ( riding cable)
A vessel is experiencing heavy weather and starting to pitch heavily. Some pounding of the fore end is beginning to affect the ship. What action should the officer of the watch take?
The speed of the vessel should be reduced to avoid structural and cargo damage.
A vessel lies at anchor when another ship approaches on a collision course . How can the anchored vessel avoid the line of approach of the incoming vessel?
Sound five or more short rapid blasts, If engines are ready steam over her own cable to be clear of the collision. Give the vessel a sheer by using hard rudder to try and avoid collision.
