Language selection


Hydrographic Survey Management Guidelines

2 Hydrographic Survey Instructions

All hydrographic survey projects should have project instructions defining the work to be done. Detailed survey instructions should be written once the survey project has been approved and is scheduled to be executed.

2.1 Field Survey Instructions

The purpose of Field Survey Instructions is to list the work to be done and provide supplementary information not covered in the CHS standards, the regional Hydrographic Survey QMS procedures or other documents issued by CHS. The survey project instructions should be approved by the Manager of hydrographic surveys.

The details included in the survey project instructions will vary depending on the nature of the survey and its complexity, however, they should include:

If the project is carried out by the CHS, the following information could also be added:

If the project is carried out by an independent firm for the CHS, the following information must also be added:

Additional requirements or modified survey instructions resulting from information and requests that were not available or known at the time the original instructions were written could be issued during the course of the survey.

2.2 Survey completion

In normal circumstances, a hydrographic survey should be planned and executed in a manner that will allow completion of all phases of the field work as the initial sounding coverage progresses. The initial sounding coverage should not progress far ahead of the other essential elements required to complete a specific area (shoal exams, bottom samples, range lines, positioning of fixed aids and conspicuous objects, etc.) as completed areas can readily be used to create or update CHS products.

If, during the course of a hydrographic survey, the Hydrographer-In-Charge (HIC) considers that the work specified in the survey instructions cannot be completed, he/she should plan to ensure completeness of a particular portion of the survey area.

Date modified: