zyousentetuduki de zyousenken wo miseru.

A natural reading is:

じょうせんてつづき で じょうせんけん を みせる。

Word by word:

• 乗船手続き = じょうせんてつづき
• で
• 乗船券 = じょうせんけん
• を
• 見せる = みせる

乗船手続き is a compound noun:

• 乗船 = boarding a ship, boat, or ferry
• 手続き = procedure, formal process

So 乗船手続き means something like:

• boarding procedure
• check-in for boarding
• the boarding process

In context, it refers to the place or stage where you complete the formalities before getting on board.

Here, で marks the place or situation where an action happens.

So:

• 乗船手続きで = at the boarding procedure / during check-in

It tells you where the action 見せる happens.

A very literal breakdown is:

• 乗船手続きで = in the boarding procedure
• 乗船券を = the boarding ticket
• 見せる = show

So the idea is show your boarding ticket at check-in / during the boarding procedure.

This is a very common learner question.

• で marks the place where an action is performed.
• に often marks a destination, a specific point in time, or the target of something.

Since 見せる is an action that takes place at the boarding procedure, で is the natural choice.

Compare:

• 駅で待つ = wait at the station
• 学校で勉強する = study at school

In the same way:

• 乗船手続きで見せる = show it at the boarding procedure

Using に here would sound unnatural for this meaning.

を marks the direct object of the verb.

The verb here is 見せる, which means to show.
What are you showing? 乗船券.

So:

• 乗船券を見せる = show the boarding ticket

This is the standard pattern:

• パスポートを見せる = show your passport
• IDを見せる = show your ID
• チケットを見せる = show your ticket

They are related, but they mean different things:

• 見る = to see / to look at
• 見せる = to show

Examples:

• チケットを見る = look at the ticket
• チケットを見せる = show the ticket

So in this sentence, the action is not looking at the boarding ticket, but showing it to staff.

No. 見せる is the plain dictionary form.

You might expect something more polite, such as:

• 乗船券を見せてください。 = Please show your boarding ticket.

But signs, instructions, manuals, and short procedural directions often use the plain form because it is short and efficient.

So this sentence feels like:

• an instruction on a sign
• a checklist item
• a simple procedural direction

Japanese often leaves out the subject when it is obvious from context.

Here, the hidden subject is something like:

• you
• the passenger
• customers

So the full idea is basically:

• You should show your boarding ticket at the boarding procedure.

Japanese does this very often, especially in instructions and signs.

乗船券 literally means a boarding ticket or ticket for boarding a ship, boat, or ferry.

Depending on the real-world situation, it may be translated as:

• ticket
• boarding pass
• boarding ticket

The exact English wording depends on the transport system, but in Japanese, 乗船券 specifically refers to the document/ticket you use to board.

Yes, but it sounds like an instruction rather than a full conversational sentence.

In ordinary conversation, someone might say:

• 乗船手続きで、乗船券を見せてください。 = Please show your boarding ticket at check-in.
• 乗船手続きのときに、乗船券を見せます。 = I show my boarding ticket during the boarding procedure.

The original version is natural in contexts like:

• signs
• guidebooks
• instruction lists
• language learning examples

So it is complete enough, but stylistically it is brief and instructional.