The use of magnets as aids to navigation can be traced back at least to the eleventh century . 磁鐵用于航海,至少可追溯到11世紀。
The main dimensions of aids to navigation on inland waterways 內(nèi)河助航標志的主要外形尺寸
Trailered inter - coast waterway aids to navigation boats 入海河口引航船
Pharos is an important aid to navigation for ships 航標燈是江河與海洋上船只重要的助航標志。
The regulation for surface colours of the visual aids to navigation in china 中國海區(qū)視覺航標表面色規(guī)定
Aids to navigation on inland waterways 內(nèi)河助航標志
Superintendent of aids to navigation 輔航設(shè)備監(jiān)督
It also maintains aids to navigation and mooring buoys for ocean - going ships , manages two cross - boundary ferry terminals and administers eight public cargo - working areas . the department s web site 該處又維持輔航設(shè)備和遠洋船舶系泊浮泡,并管理兩個跨界客運碼頭和八個公眾貨物裝卸區(qū)。
According to the consistent conclusion of the three applied methods , the paper demonstrates the feasibilities for the three quantitative methods of technical risk evaluation of aids to navigation 通過三種方法排序的一致性,可以明確得出指標體系中各風險評估指標對航標技術(shù)風險的影響程度。
According to the require of the international management of aids to navigation , the quality assessment system of regional msa is established basing on the analyse of quality assessment of china coastal aids to navigation , which applies to the assessment of regional msa 海區(qū)的航標質(zhì)量考核指標體系,是依據(jù)國際航標管理的要求,經(jīng)過對中國沿海航標質(zhì)量考核的分析和評價的基礎(chǔ)上所建立起來的,該考核適用于對海區(qū)的考核。