根據SOLAS V reg19、20，船舶所需要的航儀如下
＊所有船舶：
1.標準磁羅經
2.電子航行定位裝置(GPS、GLONASS、DGPS/DGLNAS)
3.雷達反射器(radar reflector)
4.音聲接收系統(sound reception system)
5.360度方位盤或測方位裝置(pelorus or compass bearing device)
6.緊急通訊電話(telephone)
7.電子海圖(ECDIS)
8.海圖之支援系統(nautical charts)
9.table or curve of residual deviation of magnetic compass
＊所有客船及＞＝150GT的船舶，須另外配備
1.備用羅經(spare magnetic compass)
2.日間信號燈(daylight signaling lamp)
＊所有客船及＞＝300GT的船舶，須另外配備
1.回音測深儀(echo sounding device)
2.IAMSAR
3.9GHz雷達
4.EPA(總噸位更大，可以被其他儀器取代)(electronic plotting aid)
5.SDME(speed and distance measuring equipment)(對水)
6.THD(transmitting heading device)
7.AIS(automatic deification system)
＊＞＝500GT的船舶，須另外配備
1.gyro compass and transmitting heading device
2.gyro compass heading repeater
3.gyro compass bearing repeater
4.舵腳、羅達轉速表、推力計、螺矩指示計
5.自動目標循跡裝置ATA(automatic tracking aid)
＊＞＝3000GT的船舶，須另外配備
1.second radar of 3GHz or 9Ghz considered appropriate by administration
2.second ATA
＊＞＝10000GT的船舶，須另外配備
1.避碰雷達ARPA(automatic radar plotting aid)(還需要一部ATA)
2.heading or track control system(HCS or TCS)
＊＞＝50000GT的船舶，須另外配備
1.turn rate indicator
2.SDME(對地)
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