public class ShipObject
{

}

public class ShipsContainer
{
    private Dictionary<int, ShipObject> m_ShipDict;

    public void AddShip(ShipObject ship)
    {
        m_ShipDict.Add (ship.GetHashCode (), ship);
    }

    public ShipObject GetShipByHash(int hash)
    {
        return m_ShipDict [hash];
    }

    public void RemoveShip(int hash)
    {
        if (m_ShipDict.ContainsKey (hash))
        {
            m_ShipDict.Remove (hash);
            return;
        }

        Debug.Log ("Ship not found!");
    }
}