AusBarge group of companies Logo Design Project

This is what various, different for each company, see above was looking for in their logo design

We have a group of 5 marine based service companies including a new marine based service company. All have different logo's (which we want to replace) but are effectively part of the same group of companies and management. We would like a theme or common image as part of the logo for all the companies.
Perhaps the text of the logo could indicate the company and the image be common, but we are open to ideas.
The services we provide include tug, barge, ship lines service, marine project management, marine berth maintenance, pollution equipment services and maintenance, ship management, coastal and international towage, offshore oil industry support

Further details can be provided.

The company names are;
AusBarge Marine Services (AusBarge)
National Marine Services (NMS)
Port Jackson Harbour Services
Barges Australia
Port & Coastal Marine Services

The current AusBarge logo is attached
The file called blank 25 has a logo design we … Read more