The 40+ trooptransports to the west indies (or east indies) in 1802-3 sailed through the channel as it was peace. The last trooptransport to leave Holland before the end of the peace of Amiens was the Diana on 4 january 1803 so well before the end of the peace. The lack of more transports after this date was more due to organisational issues. After the end of the peace no more troops were send except for the Utrecht in 1807 which was shipwrecked as the risk was deemd too high. Individuals or mail were send by fast mailships or neutral ships. In general, also before the peace of Amiens, the route for ships was around the north of England as the channel was to much guarded bij the Royal Navy. For example two marine bataillions were formed in 1801 to attack south africa but they could not leave Hellevoetsluis because of the english blockade.