If your need is expected to be continuous then a Subscription based charge is better. If you require data on an ad hoc basis, then a Credit based charge might be more cost-effective.
The position data is updated every few seconds. Note that this does not necessarily mean that there will be a new position for each vessel every few seconds.
You can call the Credit based services as often as needed. You are only charged for the records returned. The request frequency of the Subscription based services depends on the subscription agreement.
You can request a trial through the Contact Us page.
You can see a detailed pricing of Credits by visiting our Credit Plans.
You need to send us an email with the credits you want to buy and we will give you payment instructions. You can pay either by wire transfer or credit card (PayPal).
Sure! Credits purchased can be used for all Credit based methods.
Remaining credits balance is included in each data response.