The URL for how to sign up to the API key in the read.me is no longer valid
In this paragraph:
API Key
First up, you will need an API key from the Admiralty Maritime Data Solutions developer portal. Follow their guide on how to do so and select one of the UK Tidal API products - the Discovery tier is free (the paid APIs are untested for this integration, but should in theory work fine).
The URL for how to sign up to the API key in the read.me is no longer valid
In this paragraph:
API Key First up, you will need an API key from the Admiralty Maritime Data Solutions developer portal. Follow their guide on how to do so and select one of the UK Tidal API products - the Discovery tier is free (the paid APIs are untested for this integration, but should in theory work fine).
The URL I found this on was https://developer.admiralty.co.uk/docs/startup and here https://admiraltyapi.developer.azure-api.net/