ISO 11674:2019 船舶と海洋技術—船首制御システム | ページ 5

3.1.1

adjustment control

control which changes the characteristics of an automatic heading (3.1.7) control unit

3.1.2

back-up navigator

individual, generally an officer, designated by the ship master to be on call if assistance is needed on the bridge

[SOURCE:IMO Resolution MSC.74(69), Annex 2:1998, para 4]

3.1.3

change-over control

function for changing over from automatic to manual steering (3.1.10) and vice versa

3.1.4

central alert management

CAM

functionality for the management of the presentation of alerts on the CAM-HMI (3.1.5) , the communication of alert states between CAM-HMI and navigational systems and sensors

Note 1 to entry: The functions may be centralized or partly centralized in subsystems and interconnected via a standardized alert-related communication.

[SOURCE:IMO Resolution MSC.302(87):2010, Appendix 1]

3.1.5

central alert management HMI

CAM-HMI

human machine interface for centralized presentation and handling of alerts on the bridge

[SOURCE:IMO Resolution MSC.302(87):2010, Appendix 1]

3.1.6

central alert management system

CAM system

combined functionality of CAM (3.1.4) and CAM-HMI (3.1.5)

[SOURCE:IEC 62923-1:2018, 3.1.18]

3.1.7

heading

direction in which the longitudinal axis of the ship is pointed, defined by the angle between the meridian through its position and the fore-and-aft line of the ship, expressed in angular units from true north

Note 1 to entry: The heading is expressed in degrees from true north 000° clockwise through 360°, where 360° becomes identical to 000°.

3.1.8

heading changing

function of the heading (3.1.7) control unit to change a ship’s heading towards the altered preset heading (3.1.14) by taking the rudder order within the rudder limit, while if possible turning with a preset turn rate or with a preset turning radius, within limits related to the ship's manoeuvrability

3.1.9

heading keeping

function of the heading (3.1.7) control unit to keep a ship’s heading at the preset heading (3.1.14) by taking the rudder order within the rudder limit, within limits related to the ship's manoeuvrability

3.1.10

manual steering

method of controlling the steering gear manually

3.1.11

off-heading

situation in heading keeping (3.1.9) , where the ship’s heading (3.1.7) has deviated from the preset heading (3.1.14) beyond a preset limit

3.1.12

overshoot

occurrence of a ship’s heading (3.1.7) response exceeding the preset heading (3.1.14) during heading changing (3.1.8) , when the preset heading is given as a step input to the HCS

3.1.13

power supply

connection point of the HCS to the electrical system on board

Note 1 to entry: A power supply is an external interface to the HCS and may include any AC or DC voltage as defined by the manufacturer. A HCS may have multiple power supplies.

3.1.14

preset heading

direction in which a ship is steered or intended to be steered as entered into the heading (3.1.7) control system

Note 1 to entry: Preset heading is expressed as the angular direction in degrees from true north 000° clockwise through 360°, where 360° becomes identical to 000°.

3.1.15

single operator action

one manual control

procedure achieved by no more than one hard-key or soft-key action, excluding any necessary cursor movements, or voice actuation using programmed codes

[SOURCE:IMO Resolution MSC.302(87):2010, Appendix 1]

3.1.16

steering gear control system

SGCS

function that calculates and provides commands to the rudder actuator(s) to achieve the rudder angle according to the rudder order provided

3.1.17

total power failure

absence of sufficient electrical voltage on all power supplies of the EUT

3.1.18

turning-radius control

method of controlling the rate of turn of a ship to perform turns with a preset turning radius through the water

3.1.19

turn rate control

method of controlling the rudder of a ship to perform turns with a preset turn rate

3.1.20

undershoot

occurrence that during heading changing (3.1.8) , the ship’s heading (3.1.7) has never reached the preset heading (3.1.14) and the difference between the preset heading and the heading is not within the specified range from the preset heading before/at specified time t_u

Note 1 to entry: See 4.4.3.1.

3.1.21

waypoint

geographic position together with its associated data

[SOURCE:IEC 62065:2014, 3.1.43]