# Ship propulsion and Tankers, barges and fuel trucks

Energy flows from tankers, barges and fuel trucks to ship propulsion; their prices have moved together.

Source page: https://www.materialinsights.org/links/ship-propulsion-and-tankers-barges-and-fuel-trucks/

[Ship propulsion](https://www.materialinsights.org/energy/e_marine/) (energy) and [Tankers, barges and fuel trucks](https://www.materialinsights.org/energy/e_tankers/) (energy): 2 relationships.

## How they are linked

### 1. Energy flow

*Physical flow · 6% of flow · Tankers, barges and fuel trucks → Ship propulsion*

Bunker barges refuel ships in port.

- **6%** of Tankers, barges and fuel trucks's energy goes this way

### 2. Price link: shipbuilding

*Cost and price · Weak · Both ways*

New tankers come from shipyards whose prices follow order books, steel and labour. The shipbuilding proxy is a US series that barely tracks world freight, with monthly moves correlating at 0.07, so treat this as a weak link.

- **0.07** monthly change correlation
- **0.19** 12-month change correlation
- **1.86** fitted elasticity

Built from the site data on production routes, energy flows, industry value chains, input-output tables and prices.