Kjørerampen og fortøyningstauet er klare.

A natural breakdown is:

• kjørerampen = the vehicle ramp / loading ramp / drive-on ramp
• og = and
• fortøyningstauet = the mooring rope / mooring line
• er = is/are
• klare = ready

So the whole sentence means something like:

The ramp and the mooring rope are ready.

In context, especially on a ferry or ship, kjørerampe is the ramp vehicles drive on or off, and fortøyningstau is a rope/line used to secure the vessel.

Those are the definite endings in Norwegian.

• kjørerampe = a ramp

• kjørerampen = the ramp

• fortøyningstau = a mooring rope
• fortøyningstauet = the mooring rope

In Norwegian, the definite article is usually attached to the end of the noun instead of being a separate word like the in English.

Very roughly:

• common gender nouns often take -en in the definite singular
• neuter nouns often take -et in the definite singular

So here:

• kjørerampen is definite singular
• fortøyningstauet is definite singular

Each noun is singular by itself, but together they form a compound subject:

• kjørerampen og fortøyningstauet = the ramp and the mooring rope

That means the subject as a whole is plural: two things.

Because of that, the predicate adjective must be plural:

• singular: Rampen er klar. = The ramp is ready.
• singular: Tauet er klart. = The rope is ready.
• plural: Rampen og tauet er klare. = The ramp and the rope are ready.

So klare is used because we are talking about more than one thing.

Norwegian adjectives often agree with what they describe.

For klar:

• klar = singular, common gender
• klart = singular, neuter
• klare = plural (and also definite forms in many contexts)

Examples:

• En båt er klar. = A boat is ready.
• Et tau er klart. = A rope is ready.
• To båter er klare. = Two boats are ready.

In your sentence, the subject contains:

• kjørerampen — common gender singular
• fortøyningstauet — neuter singular

But because they are joined by og, they become a plural subject, so the adjective becomes klare.

Because Norwegian verbs do not change for person or number the way English verbs sometimes do.

English:

• it is
• they are

Norwegian:

• den er
• det er
• de er

So er works for both singular and plural.

Examples:

• Rampen er klar. = The ramp is ready.
• Tauet er klart. = The rope is ready.
• Rampen og tauet er klare. = The ramp and the rope are ready.

The adjective changes, but the verb er stays the same.

Yes. Norwegian uses compound nouns very often.

kjørerampen

This comes from:

• kjøre = drive
• rampe = ramp

So kjørerampe is literally something like drive-ramp, meaning a ramp used for driving onto or off something.

fortøyningstauet

This comes from:

• fortøyning = mooring
• tau = rope
• -et = definite ending

So fortøyningstauet means the mooring rope.

This is very normal in Norwegian. English often writes such ideas as separate words, while Norwegian often combines them into one noun.

Fortøyning means mooring or the act/system of fastening a boat or ship.

A fortøyningstau is a rope used for mooring.

You may also see similar forms in Norwegian compounds, and in real usage there can be some variation depending on style or technical vocabulary. But in this sentence, fortøyningstauet clearly means the mooring rope/line.

In maritime English, line may sound more natural than rope, so depending on context, you could also think of it as:

the mooring line

Because Norwegian usually expresses definiteness by adding it to the noun itself.

Compare:

• English: the ramp

• Norwegian: rampen

• English: the rope
• Norwegian: tauet

This is one of the first big differences English speakers notice.

You can still get an extra word like den/det/de in some constructions, but not here. In this simple sentence, the ending on the noun already gives the meaning the.

Yes, klar/klart/klare can sometimes mean clear, but in this sentence ready is the more natural meaning.

Why?

Because the sentence is about equipment or parts of a vessel:

• the ramp
• the mooring rope

When someone says they are klare, the likely meaning is that they are prepared for use, in position, or ready.

So here:

Kjørerampen og fortøyningstauet er klare
most naturally means
The ramp and the mooring rope are ready.

The word order is very straightforward:

• Kjørerampen og fortøyningstauet = subject
• er = verb
• klare = predicate adjective

So the structure is:

subject + verb + adjective

This is exactly the kind of basic word order you would expect in a simple Norwegian main clause.

Like this:

• Kjørerampen er klar. = The ramp is ready.
• Fortøyningstauet er klart. = The mooring rope is ready.

Notice the adjective changes:

• klar with kjørerampen because rampe is common gender
• klart with fortøyningstauet because tau is neuter

But when combined:

• Kjørerampen og fortøyningstauet er klare.

the adjective becomes plural: klare.

A rough English-friendly guide:

• kjørerampen ≈ SHUR-uh-ramp-en or HYUR-uh-ramp-en, depending on accent
• fortøyningstauet ≈ for-TOY-nings-tow-et
• klare ≈ KLAH-reh

A few useful notes:

• kj in many Norwegian accents sounds somewhat like a soft h-y or sh-like sound
• ø is a vowel English does not really have; it is somewhat like the vowel in French peu or German schön
• au in tau is pronounced roughly like ow in cow

Exact pronunciation varies by dialect, but those approximations can help you get started.