You can use Credit and Debit cards through Paypal without needing a Paypal account.
When submitting your Subscription form, you are automatically send to the Paypal log-in page.
Click on the button 'Pay with Debit or Credit Card'.
Fill in the details of Credit/Debit card and click on 'Pay Now'.
You will receive a receipt from Paypal and an automatic confirmation e-mail from the International Maritime Rescue Federation (IMRF), telling you that the IMRF Supporter Subscription form has been submitted.