Maritime units require a good tactical maritime picture to help them conduct their operations. In future operations will be more complex and the weapon engagement ranges greater, so increasing the requirement for a high quality tactical maritime picture. The number of maritime platforms which contribute to the tactical maritime picture will decrease, so increasing the importance of reliable information exchange between platforms. This will most likely place greater demands on the maritime tactical command network. FOI Defence Analysis Division has developed two computer models in conjunction with the Royal Swedish Navy Naval Command and Control working group. Using these it is possible to study the characteristics of the tactical command networks supporting both Royal Swedish Navy Tactical Doctrine and NATO/PfP operational methods. These differ primarily in the way units exchange target data with other units and also which units can transmit simultaneously without data loss. Preliminary results indicate that a correlated tactical maritime picture can be compiled more quickly using a common tactical command network than it can with a hierarchical command network. The results also indicate that as command systems develop and start to handle more targets the training and communications discipline required of warfare officers will increase irrespective of which network structure is used to support information exchange.