INFOMAR PHASE 2

Mapping the offshore gap

Dr. Fabio Sacchetti

Hydrographic Team Leader. INFOMAR. Marine Institute

Phase 2 – what’s left

Phase 2 – what’s left

Depth classes Ship classes

Phase 2 – How many days?

Assumptions

• Survey speed of 8 kt

• Swath coverage

limited to 65°

• Average line overlap

of 20%

Phase 2 – How many days?

Further assumptions

• Port calls/ mob and demob days. In this calculation it is estimated that 2 days of mob/demob

time are required every 4 weeks.

• Weather and technical standby. The amount of survey days are deliberately increased by 20%

to take into account of weather and/or technical downtime.

Followings are not included in the assesment:

1. Bathymetric area 0-50 which will also require considerable amount of work on smaller survey

vessels.

2. Many other factors such as equipment upgrades and maintenance, cross lines, sampling, data

management and interpretations are also ignored.

schematic breakdown of

the 700 operational days.

Box sizes proportional to

water depth

Phase 2 – possible survey design