Those two black and white boats are hydrographic boats .

那两个黑白相间的船是水文测量船。

Iho committee on hydrographic requirements for information systems-chris .

此规范系於一九九一年八月iho海道需求资讯系统委员会。

Portland , ore. , firm wins $ 13.2 million contract to refurbish hydrographic survey ship .

俄勒冈州波特兰公司赢得1320万美元的水文测量船的改装合同。

Participants will tour hydrographic surveying vessels from several countries , which have sailed in for the occasion .

与会者将登上几个国家的海道测量船，这些船已经驶入港口待命。

International advisory board on standards of competence for hydrographic surveyors and nautical cartographers .

同意去掉海道测量师和海图制图师适任标准国际咨询委员会。