Type Has No Subscript Members?

You have to explicitly add subscripting support to the class in order to use the subscript syntax, e.g. ship[index].

Here are the docs that cover subscripting and how to add subscripting to your class:

https://developer.apple.com/library/ios/documentation/Swift/Conceptual/Swift_Programming_Language/Subscripts.html

Add a subscript to your Ship object to return an optional Coordinate:

subscript(index: Int) -> Coordinate? {
    guard let coordinate = shipCoors?[index] else {
        return nil
    }
    return coordinate
}

shipCoors is declared as [Coordinate]? (an optional array), so there's a risk a Ship won't have an array in shipCoors. In this case I return nil, but you can return whatever you want instead.

Had similar issue in Swift 3

Type '() -> [myObject]' has no subscript members

In my case, It was a simple case of not adding the brackets to the function-call "()". school boy error.

i.e. the below code was the culprit

dataModel.myFunction

Solved with dataModel.myFunction()