位置定位中止
Command to discontinue planned position fixing process when results are unreliable or time-critical manoeuvre takes priority.
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Maneuvering
Browse Maneuvering terms for maritime professionals.
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侧向力补偿方案
A navigational strategy to counteract lateral forces (wind, current, propeller wash) that may cause a vessel to drift sideways during berthing or channel transit.
View term侧滑角监测
Continuous observation of vessel’s lateral drift angle relative to track to ensure safe approach trajectory during docking.
View term倒车功率储备
Remaining astern propulsion capacity beyond that required for standard manoeuvre, ensuring additional stopping margin.
View term倒车惯性检查
Verification manoeuvre carried out to ensure the vessel’s astern power can promptly overcome residual forward momentum before final approach or emergency stop.
View term偏离控制
Active steering or thruster management to prevent a vessel from swinging away (sheering off) from its intended track or berth during approach.
View term偏航力矩补偿
Adjustment of rudder angle, thruster output, or tug forces to counteract undesired yawing moments during low-speed manoeuvres.
View term动态定位保持
A control mode where a vessel maintains its heading and position automatically using thrusters and propellers, essential for offshore operations and station keeping.
View term反向动量检查
Verification that astern power has arrested forward momentum before changing engine orders during docking sequence.
View term反推冲击
A short, controlled burst of astern propulsion to quickly reduce a vessel’s forward speed or stop movement during precise manoeuvring.
View term发动机负载响应
The manner and speed at which the main engine adapts to sudden changes in power demand, crucial for manoeuvring and heavy weather operation.
View term受控横漂角
Intentional small leeway angle set between vessel heading and track to counter cross-wind or current during approach.
View term可调螺距桨正桨角
A controllable pitch propeller blade setting that provides forward thrust, the amount adjusted for desired vessel speed and power.
View term可调螺距桨负桨角
A controllable pitch propeller blade setting that provides astern thrust for stopping or reversing the vessel.
View term可调螺距桨零位
The position of a controllable pitch propeller (CPP) where the blades are aligned to produce no thrust, used for stopping or neutral operation.
View term吊艇架净空检查
Process of ensuring the davit’s operational path is free of obstruction and ready for safe lifeboat launching or recovery.
View term吸力效应估算
The assessment of negative pressure that draws a vessel toward another object or structure during close-quarter manoeuvring, affecting control and safety.
View term声学多普勒测量
A navigational process using Doppler sonar to measure vessel speed and direction relative to water, crucial for precise manoeuvring and dynamic positioning.
View term大风靠泊
A berthing operation performed in high wind conditions, requiring specific techniques, increased tug assistance, or thruster use to maintain control and safety.
View term惯性控制策略
The procedure and logic used to manage a vessel's inertia during changes in speed or heading, optimizing response time and safety during close-quarters manoeuvring.
View term战术回转直径评估
Assessment of the vessel’s maximum transverse distance travelled during a turning circle with constant rudder angle at full speed.
View term扭转轴振动
Oscillation in the propulsion shaft caused by variations in torque, potentially leading to machinery damage if not controlled.
View term抛锚降速
Deliberate decrease in vessel speed to a safe limit before anchor deployment, minimizing anchor dragging and ensuring proper holding.
View term护舷能量吸收
Capacity of berth fender system to absorb kinetic energy of vessel at specified berthing velocity without exceeding design deflection.
View term拖船引缆更换
The coordinated operation in which a tug alters its line connection point or position to adapt to new towage requirements during berthing or unberthing.
View term拖轮协助请求
Formal VHF or written message from vessel or pilot to harbour authority asking for specified tug support for manoeuvring.
View term拖轮系柱拉力核实
Confirmation that a tug’s certified bollard-pull matches terminal requirements before allocating towage tasks.
View term拖轮缆绳张力
The force applied to a tow or mooring line connecting a tug to a vessel, monitored to ensure safe and effective manoeuvring or holding.
View term指令延迟补偿
Systematic adjustment made to navigation or machinery commands to account for time lag between order and vessel response, ensuring precise manoeuvring.
View term推力分配模型
A computational approach for optimally distributing propulsion thrust among multiple thrusters to achieve desired vessel motion and heading.
View term推进器减速停机
The process of safely reducing thruster power and shutting down the units after manoeuvring or while leaving station keeping mode.
View term推进器加速
A procedure where thrusters are gradually powered up and tested before being engaged for manoeuvring or station keeping.
View term推进器效率系数
A calculated ratio indicating how effectively a vessel’s thruster converts power input into thrust for manoeuvring operations.
View term操纵杆操控模式
A control setting that allows a vessel to be steered and positioned using a joystick, integrating thrusters and main propulsion for precision movement, especially during berthing.
View term操纵面集成
The coordinated operation of rudders, stabilisers, and other movable surfaces to achieve optimal vessel steering and stability.
View term方位推进器锁定
A system state where azimuth thrusters are held in a fixed orientation to prevent movement, usually for safety during maintenance or when not required for manoeuvring.
View term机车传令器堵塞
A failure or obstruction in the engine telegraph system, preventing bridge orders from being transmitted to the engine room or vice versa.
View term枢转点估算
Calculation of the vessel’s instantaneous longitudinal pivot point to predict turn characteristics in low-speed manoeuvring.
View term横摇周期估算
An evaluation of the time taken for a vessel to complete one full roll oscillation, essential for stability analysis and safe loading.
View term水密度补偿
The adjustment made to vessel loading or draught calculations to account for local water density, affecting buoyancy and safe draft.
View term水射流反推
A manoeuvring action where the direction of waterjet propulsion is reversed, providing astern thrust for stopping or moving the vessel backwards.
View term水深警报
An alert activated when the measured depth beneath a vessel approaches a pre-set minimum, used to avoid grounding.
View term泊位对准灯
Pair or range of fixed shore lights that provide visual guidance to vessels for centreline alignment during final approach to berth.
View term泊位适用性检查
A verification process to ensure the selected berth meets vessel requirements in terms of depth, length, fendering, and operational limits before mooring.
View term滑移计算模式
A navigational mode where a vessel’s slip—the difference between theoretical and actual movement—is monitored and calculated for safe manoeuvring, especially in current-affected waters.
View term滑行路径控制
Continuous monitoring and adjustment of a vessel’s approach trajectory to the berth, ensuring a smooth, controlled entry under varying environmental forces.
View term滑道进港航线
The planned or observed vessel path when aligning for entry onto a slipway, critical for safe launching or hauling operations.
View term漂移角警报
Navigation sensor alert triggered when vessel’s leeway or sideslip exceeds predefined safe threshold relative to track.
View term激光靠泊系统
High-precision laser array projecting range and angular deviation data to vessel displays for centimetre-level berthing accuracy.
View term电子靠泊辅助
Shore-based microwave or laser sensor system providing real-time range, closing speed, and alignment data to approaching vessel.
View term相互作用区警告
Advisory issued when proximity of shallow banks or passing vessels may cause hydrodynamic interaction affecting steering and under-keel clearance.
View term粘性流体阻力
The resistance experienced by a vessel as it moves through water due to the fluid’s internal friction, affecting speed and fuel efficiency.
View term系泊张力监测
Real-time supervision of static and dynamic loads on mooring lines to maintain safe tension limits under environmental forces.
View term紧急停车距离
Measured distance travelled from full ahead to complete stop using maximum astern power and rudder amidships.
View term紧急快速停车操纵
Emergency procedure whereby engine is set full astern and helm hard over to rapidly stop vessel’s forward motion within minimum distance.
View term纵向摇摆控制
Management of longitudinal oscillations of vessel while moored, using winch tension adjustments or tug assistance to prevent contact damage.
View term纵摇力矩控制
The regulation of longitudinal pitching moments of a vessel, using ballast or thrusters, to ensure stability and reduce motion in varying sea states.
View term绞缆柱牵引力
Maximum continuous line-pull that a deck capstan can exert when hauling mooring lines at rated speed.
View term绞车制动保持力
Certified static load that a mooring-winch brake can safely withstand without paying out when lines are under tension.
View term缓冲效应估算
An assessment of the air or water pressure that builds up between a vessel and the berth or another vessel, influencing manoeuvring dynamics during close approach.
View term航道横流
Lateral water flow across a dredged channel causing set and drift that must be compensated during navigation.
View term舵同步警报
An alert indicating a mismatch between helm (steering wheel) position and rudder angle, requiring immediate attention to prevent loss of steering control.
View term舵效失灵
Reduction in steering response due to low water flow over rudder, cavitation, or mechanical limitation.
View term舵角限制器
Device or setting restricting maximum rudder angle to prevent over-steer at speed or protect steering gear.
View term艉速报警
An alarm triggered when a vessel's sternway (reverse movement) exceeds a preset speed threshold, alerting crew to possible navigational hazards during astern operations.
View term艏侧推使用
Use of bow thruster to generate lateral force at bow for precise positioning or counteracting environmental forces during manoeuvring.
View term艏力矩系数
A calculated factor describing the turning moment generated by the bow, crucial for assessing vessel manoeuvrability during pilotage and berthing operations.
View term艏向速率控制
Autopilot or manual feedback setting that governs how rapidly the vessel’s heading may change, expressed in degrees per minute.
View term螺旋桨护罩检查
Inspection of the propeller guard for integrity and correct positioning before manoeuvring or departure, ensuring safe protection against entanglement or damage.
View term螺旋桨横向效应
Side-force generated by propeller rotation causing yaw, especially stern kick to port or starboard when powering ahead or astern.
View term螺旋桨步行效应评估
Evaluation of sideways movement (walk) caused by propeller rotation while making headway or sternway at low speed.
View term螺距同步
Matching of pitch angles on controllable-pitch propellers to balance thrust and avoid yaw during twin-screw operations.
View term转向偏差修正
The adjustment made to compensate for a vessel’s natural tendency to turn more easily in one direction due to hull design, wind, or propeller effect.
View term转向反馈回路
A control system that continually monitors rudder position and vessel heading to automatically correct steering and maintain set course.
View term转率预测器
ECDIS or radar-derived graphic that projects vessel’s future position based on present speed and rate of turn settings.
View term运动参考单元
A device that detects and reports a vessel’s six degrees of motion, used to support dynamic positioning and other navigational systems.
View term进港航线核实
Confirmation that vessel’s intended approach line aligns with planned track and pilot’s instructions before final manoeuvring.
View term进距计算
Determination of the longitudinal distance the vessel travels on the original heading during a turn from rudder order until reaching new course.
View term进靠距离标记
Painted, lit, or electronic reference indicating remaining longitudinal distance to berth face during final approach.
View term递增动力冲击
A technique involving small, timed increases in engine or thruster power to control a vessel’s position or heading precisely during docking or undocking.
View term速率稳定模式
Autopilot setting that dampens oscillations by keeping rate of turn constant once a target value is reached during manoeuvre.
View term防撞板接触
The point or process where the vessel's hull makes contact with the berth fender panel, usually monitored to avoid structural damage.
View term零速保持
A function in vessel control systems where speed is automatically kept at zero, holding position against wind, current, and drift, without anchoring.
View term静力修正变化
Change in a vessel’s longitudinal trim resulting from variations in hydrostatic forces due to ballast, cargo, or water density changes.
View term靠泊坡道坡度
The measured incline of a docking ramp, influencing the safe entry, exit, and support of a vessel during docking or undocking.
View term靠泊能量预算
The total kinetic energy allowed for a vessel to safely berth, accounting for mass, speed, and fender capacity to prevent damage.
View term靠泊速度限制
Maximum allowable approach speed normal to berth to prevent fender overload and structural damage.
View term领角修正
Adjustment applied to ship’s heading to offset predicted set and drift so that actual track leads planned approach line.
View term驾驶翼间隙
Minimum air gap required between ship’s bridge wing extremities and shore structures or lock walls during manoeuvring.
View term龙骨下距测量
Hydrographic assessment confirming minimum clearance between keel and seabed along planned passage meets safety criteria.
View term